Communication method and device

Abstract

The invention discloses a communication method and device, which are used for determining proper signal transmitting power under the condition that a terminal cannot determine path loss between the terminal and a base station. In the method, the compensation coefficient can be determined according to the information of the first signal, and the information of the first signal can reflect the position relationship between the terminal device and the second access network equipment, that is, the compensation coefficient can represent the position relationship between the terminal device and the second access network equipment. After the terminal device obtains the compensation coefficient, the transmitting power of the second signal can be determined through the compensation coefficient and the maximum transmitting power of the terminal device; or, the transmitting power of the second signal can be determined according to the transmitting power expected by the second access network equipment, the compensation coefficient and the path loss of the terminal device and the first access network equipment. Therefore, according to the compensation coefficient capable of reflecting the position relationship between the terminal device and the second access network equipment, the appropriate transmitting power of the second signal can be determined.

Description

Communication method and device Technical Field

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

[0002] During the propagation process, the signal is affected by path loss and shadow fading, and the signal strength will be reduced when it reaches the receiving end. Therefore, the transmitting end will appropriately adjust the transmit power to compensate for the effects of path loss and shadow fading. For example, for a certain uplink carrier of a certain cell, the actual transmit power of the terminal is usually the sum of open-loop power control, closed-loop power control and other adjustment quantities, among which open-loop power control is related to the radio resource control (RRC) high-level parameter configuration and partial path loss compensation, closed-loop power control is related to historical transmission power, and other adjustment quantities are related to frequency domain resource allocation and link adaptation. In scenarios where the terminal does not have historical transmission power information, open-loop power control is usually adopted. That is, in this case, the actual transmit power of the terminal can be the sum of the target receive power of the base station configured by the high-level layer and the path loss between the terminal and the base station. The path loss can be determined by the transmit power of the base station and the receive power of the signal received by the terminal. The transmit power of the base station can be obtained through the system message broadcast by the base station.

[0003] However, in some scenarios, such as when a base station doesn't broadcast a system message containing its transmit power, a terminal device cannot determine the path loss between itself and the base station. In these situations, to ensure the receiving end can receive the signal, the terminal device typically transmits at maximum transmit power. However, this results in unnecessary energy consumption and is detrimental to terminal energy conservation. Therefore, determining the appropriate signal transmit power when the terminal device cannot determine the path loss between itself and the access network equipment is an urgent problem to be solved.

[0004] Summary of the Invention

[0005] Embodiments of the present application provide a communication method and apparatus for determining appropriate signal transmission power when a terminal device is unable to determine a path loss between the terminal device and an access network device.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, a communication method is provided, comprising: obtaining a compensation coefficient; and sending a second signal to a second access network device based on the compensation coefficient. The compensation coefficient is determined based on information about a first signal sent by the first access network device, the information about the first signal including at least one of the following: received power of the first signal or an index corresponding to the first signal; and the transmit power of the second signal is determined based on the compensation coefficient.

[0008] Therefore, since the received power of the first signal and / or the index corresponding to the first signal can reflect the positional relationship between the terminal device and the second access network device, and the compensation coefficient can be determined based on the received power of the first signal and / or the index corresponding to the first signal, it can be understood that the compensation coefficient can represent the positional relationship between the terminal device and the second access network device. After obtaining the compensation coefficient, the terminal device can determine the transmission power of the second signal based on the compensation coefficient and the maximum transmission power of the terminal device; or, it can determine the transmission power of the second signal based on the desired transmission power of the second access network device, the compensation coefficient, and the path loss between the terminal device and the first access network device. In this way, based on the compensation coefficient that can reflect the positional relationship between the terminal device and the second access network device, the appropriate transmission power of the second signal can be determined.

[0009] The compensation coefficient can represent the positional relationship between the terminal device and the second access network device: when the first access network device and the second access network device are the same device, the terminal device cannot obtain the path loss between it and the first access network device. In this case, the greater the received power of the first signal, the stronger the wireless signal, and the closer the distance between the terminal device and the first access network device is. At this time, the compensation coefficient is also smaller; when the first access network device and the second access network device are different devices, the terminal device cannot obtain the path loss between it and the second access network device. In this case, the index corresponding to the first signal can reflect the location of the terminal device, or the received power of the first signal and the index corresponding to the first signal can reflect the approximate position of the terminal device, so that the positional relationship between the terminal device and the second access network device can be determined, and the positional relationship is expressed by the compensation coefficient, that is, the closer the distance between the terminal device and the second access network device is, the smaller the compensation coefficient.

[0010] In one possible design, the transmit power of the second signal is determined based on the maximum transmit power of the terminal device and a compensation factor. That is, the transmit power of the second signal may be the product of the maximum transmit power and the compensation factor, where the product is less than or equal to the maximum transmit power of the terminal device. In this way, even if the terminal device cannot obtain the path loss between itself and the second access network device and the second access network device's expected transmit power, an appropriate transmit power for the second signal can be determined based on its maximum transmit power and the compensation factor.

[0011] Optionally, the transmission power of the second signal is determined based on the maximum transmission power, compensation coefficient and power boost step of the terminal device; or, the transmission power of the second signal is determined based on the maximum transmission power, compensation coefficient and first power offset of the terminal device; or, the transmission power of the second signal is determined based on the maximum transmission power, compensation coefficient, power boost step and first power offset of the terminal device; wherein the power boost step is the power increased when the second signal is retransmitted, and the first power offset is determined based on the service information of the terminal device. That is to say, in addition to being determined based on the maximum transmit power and compensation coefficient of the terminal device, the transmit power of the second signal can also be determined based on the power boost step size and / or the first power offset according to actual conditions. For example, when the second signal is a retransmission signal, in order to increase the possibility that the second access network device successfully receives the second signal, the transmit power of the second signal can be determined in combination with the power boost compensation. For another example, when the terminal device has a service to be sent, the second signal can be used to wake up the second access network device in a dormant state, or request the second access network device to send a system message, etc. In order to increase the possibility that the second access network device successfully receives the second signal, the transmit power of the second signal can be determined in combination with the first power offset corresponding to the service information of the service. In this way, a more appropriate transmit power of the second signal can be determined according to actual conditions.

[0012] Furthermore, the transmission power of the second signal is expressed as: P = min {P CMAX ,α1·P CMAX +Δ1+Δ2}; where P is the transmission power of the second signal, P CMAX is the maximum transmit power of the terminal device, α1 is the compensation coefficient, Δ1 is the power increase step size, Δ2 is the first power offset, min{P CMAX ,α1·P CMAX +Δ1+Δ2} represents the CMAX and α1·P CMAX +Δ1+Δ2, select the smallest value. That is, after the terminal device determines an uplink expected transmit power based on the maximum transmit power of the terminal device, the compensation coefficient, the power boost compensation, and the first power offset, the uplink expected transmit power can be compared with the maximum transmit power of the terminal device, and the smallest value can be selected from the two as the transmit power of the second signal. In this way, it can be ensured that the transmit power of the second signal is less than or equal to the maximum transmit power of the terminal device, thereby ensuring that the terminal device successfully sends the second signal.

[0013] In one possible design, the transmission power of the second signal is determined based on the signal reception power expected by the second access network device, the path loss between the terminal device and the first access network device (denoted as path loss #1), and a compensation coefficient. It can be understood that the product of path loss #1 and the compensation coefficient can be used as the path loss between the terminal device and the second access network device (denoted as path loss #2). Therefore, the transmission power of the second signal can be determined by adding the signal reception power expected by the second access network device to the path loss #2. In this way, when the terminal device can obtain the signal reception power expected by the second access network device and cannot obtain the path loss between the terminal device and the second access network device, the appropriate transmission power of the second signal can be determined according to this method.

[0014] Optionally, the transmission power of the second signal is determined based on the signal receiving power, path loss, compensation coefficient and power increase step expected by the second access network device; or, the transmission power of the second signal is specifically determined based on the signal receiving power, path loss, compensation coefficient and first power offset expected by the second access network device; or, the transmission power of the second signal is specifically determined based on the signal receiving power, path loss, compensation coefficient and first adjustment amount expected by the second access network device; or, the transmission power of the second signal is specifically determined based on the signal receiving power, path loss, compensation coefficient, power increase step and first power offset expected by the second access network device; or, the transmission power of the second signal is specifically determined based on the signal receiving power, path loss, compensation coefficient, power increase step and first power offset expected by the second access network device. or, the transmission power of the second signal is specifically determined according to the signal reception power, path loss, compensation coefficient, first power offset and first adjustment amount expected by the second access network device; or, or, the transmission power of the second signal is specifically determined according to the signal reception power, path loss, compensation coefficient, power increase step, first power offset and first adjustment amount expected by the second access network device; wherein, the power increase step is the power increased when the second signal is retransmitted, the first power offset is determined according to the service information of the terminal device, and the first adjustment amount is the power adjustment amount related to the frequency domain resource allocation and link adaptation corresponding to the second signal.

[0015] That is to say, in addition to being determined based on the signal reception power, path loss, and compensation coefficient expected by the second access network device, the transmit power of the second signal can also be determined based on actual conditions by selecting at least one of the following: a power boost step, a first power offset, or a first adjustment amount. For example, when the second signal is a retransmission signal, in order to increase the possibility that the second access network device successfully receives the second signal, the transmit power of the second signal can be determined in combination with power boost compensation. For another example: when the terminal device has a service to be sent, the function of the second signal can be to wake up the second access network device in a dormant state, or to request the second access network device to send a system message, etc. In order to increase the possibility that the second access network device successfully receives the second signal, the transmit power of the second signal can be determined in combination with the first power offset. For another example: in order to increase the possibility that the second access network device successfully receives the second signal, the transmit power of the second signal can also be determined in combination with the first adjustment amount. In this way, a more appropriate transmit power of the second signal can be determined based on actual conditions.

[0016] Furthermore, the transmission power of the second signal is expressed as: P = min {P CMAX ,P e +α2·PL+Δ1}; where P is the transmission power of the second signal, P CMAX is the maximum transmit power of the terminal device, P e is the signal receiving power expected by the second access network device, α2 is the compensation coefficient, PL is the path loss, Δ1 is the power increase step size, min{P CMAX ,P e +α2·PL+Δ1} represents the CMAX and P e +α2·PL+Δ1, the smallest value is selected. That is, after the terminal device determines an expected uplink transmit power based on the second access network device's expected signal reception power, path loss, compensation coefficient, and power boost step size, it can compare the expected uplink transmit power with the terminal device's maximum transmit power and select the smallest value as the transmit power of the second signal. This ensures that the transmit power of the second signal is less than or equal to the terminal device's maximum transmit power, thereby ensuring that the terminal device successfully transmits the second signal.

[0017] Furthermore, the transmission power of the second signal is expressed as: P = min {P CMAX ,P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB )}; wherein, P is the transmission power of the second signal, P CMAX is the maximum transmit power of the terminal device, P eis the signal receiving power expected by the second access network device, α2 is the compensation coefficient, PL is the path loss, Δ1 is the power increase step size, Δ2 is the first power offset, 10log 10 (2 μ ·M RB ) is the first adjustment amount, μ corresponds to the subcarrier spacing used to transmit the second signal, M RB The number of resource blocks RB occupied by the second signal, min{P CMAX ,P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB )} means from P CMAX and P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB ) select the smallest value. That is, after the terminal device determines an expected uplink transmit power based on the signal received power, path loss, compensation coefficient, power boost step size, first power offset, and first adjustment amount expected by the second access network device, the expected uplink transmit power can be compared with the maximum transmit power of the terminal device, and the smallest value can be selected as the transmit power of the second signal. In this way, it can be ensured that the transmit power of the second signal is less than or equal to the maximum transmit power of the terminal device, thereby ensuring that the terminal device successfully sends the second signal.

[0018] Furthermore, the first power offset is determined based on a first correspondence between service information of the terminal device and a value of the first power offset. In this way, the terminal device can quickly and accurately determine the first power offset based on the service information and the first correspondence.

[0019] Furthermore, the first correspondence relationship originates from the first access network device and is carried in at least one of the following messages: a system message, a synchronization signal, or a radio resource control (RRC) message; or the first correspondence relationship is predefined by a protocol. In other words, the method for obtaining the first correspondence relationship can be flexibly configured based on actual circumstances.

[0020] In one possible design, obtaining the compensation coefficient includes: determining the compensation coefficient based on a second correspondence and information about the first signal; wherein the second correspondence is a correspondence between a range of values ​​of the received power of the first signal and a value of the compensation coefficient; or, the second correspondence is a correspondence between an index corresponding to the first signal and a value of the compensation coefficient; or, the second correspondence is a correspondence between the range of values ​​of the received power of the first signal, an index corresponding to the first signal, and a value of the compensation coefficient. In this way, the terminal device can quickly and accurately determine the compensation coefficient based on the second correspondence and information about the first signal.

[0021] Optionally, the second correspondence relationship comes from the first access network device and is carried in at least one of the following messages: a system message, a synchronization signal, or an RRC message; or the second correspondence relationship is predefined by the protocol. In other words, the method for obtaining the second correspondence relationship can be flexibly set according to actual circumstances.

[0022] In one possible design, the first access network device and the second access network device are the same device, and obtaining the compensation coefficient includes: receiving a secondary synchronization signal (SSS) transmitted by the first access network device; and determining the compensation coefficient based on the received signal power of the SSS. That is, when the signals periodically transmitted by the first access network device do not include system messages, the terminal device may receive the SSS and determine the compensation coefficient based on the received signal power of the SSS, thereby determining the transmit power of the second signal.

[0023] Optionally, the second signal is used to request the first access network device to send a system message, and the method described in the first aspect further includes: receiving a system message sent by the first access network device.

[0024] In one possible design, the first access network device and the second access network device are the same device, and the compensation coefficient is inversely correlated with the received power of the first signal. Specifically, a higher received power of the first signal indicates a stronger wireless signal and a closer distance between the terminal device and the first access network device; in this case, the compensation coefficient decreases.

[0025] In one possible design, the cell of the first access network device and the cell of the second access network device are adjacent cells, or the first access network device is a macro base station and the second access network device is a micro base station under the macro base station. Obtaining a compensation coefficient includes: receiving an SSS from the first access network device; and determining the compensation coefficient based on the signal reception power of the SSS and an index corresponding to the SSS, or an index corresponding to the SSS. In other words, when the second access network device is in a dormant state, or when the second access network device is a micro base station and its downlink is disabled, the terminal device can receive the SSS and determine the compensation coefficient based on the signal reception power of the SSS and an index corresponding to the SSS, or an index corresponding to the SSS, thereby determining the transmit power of the second signal.

[0026] In one possible design, the transmission power of the second signal is less than or equal to the maximum transmission power of the terminal device. That is, the transmission power of the second signal determined by the terminal device will not be greater than the maximum transmission power, thereby ensuring that the terminal device successfully sends the second signal.

[0027] In a second aspect, a communication method is provided, comprising: obtaining a second correspondence and sending the second correspondence. The second correspondence is used to indicate a correspondence between a received power of a first signal and a value of a compensation coefficient; or, the second correspondence is used to indicate a correspondence between an index corresponding to the first signal and a value of the compensation coefficient; or, the second correspondence is used to indicate a correspondence between the received power of the first signal, an index corresponding to the first signal, and a value of the compensation coefficient.

[0028] Based on the method of the second aspect, it can be seen that the first access network device sends the second correspondence, which enables the terminal device to determine a compensation coefficient based on the second correspondence and information about the received first signal. The compensation coefficient can be determined based on the received power of the first signal and / or the index corresponding to the first signal. The received power of the first signal and / or the index corresponding to the first signal can reflect the positional relationship between the terminal device and the second access network device. In other words, the compensation coefficient can represent the positional relationship between the terminal device and the second access network device. For example, when the first access network device and the second access network device are the same device, the greater the received power of the first signal, the stronger the wireless signal and the closer the distance between the terminal device and the first access network device are, and in this case, the smaller the compensation coefficient. For another example, when the first access network device and the second access network device are different devices, the index corresponding to the first signal can reflect the location of the terminal device, or the received power of the first signal and the index corresponding to the first signal can reflect the approximate location of the terminal device, thereby determining the positional relationship between the terminal device and the second access network device and representing the positional relationship through the compensation coefficient. That is, the closer the distance between the terminal device and the second access network device is, the smaller the compensation coefficient is. After obtaining the compensation coefficient, the terminal device can determine the transmit power of the second signal using the compensation coefficient and the terminal device's maximum transmit power. Alternatively, the transmit power of the second signal can be determined based on the second access network device's desired transmit power, the compensation coefficient, and the path loss between the terminal device and the first access network device. In this manner, an appropriate transmit power for the second signal can be determined based on the compensation coefficient that reflects the positional relationship between the terminal device and the second access network device.

[0029] In one possible design, the method according to the second aspect further includes: sending a first correspondence, where the first correspondence is used to indicate a correspondence between service information of the terminal device and a value of the first power offset. That is, after receiving the first correspondence, the terminal device can quickly and accurately determine the first power offset based on its service information and the first correspondence.

[0030] In addition, the technical effects of the method of the second aspect can also refer to the technical effects of the method of the first aspect, and will not be repeated here.

[0031] In a third aspect, a communication device is provided. The communication device includes: a module for executing the method described in the first aspect, such as a transceiver module and a processing module. For example, the processing module is configured to obtain a compensation coefficient, where the compensation coefficient is determined based on information about a first signal sent by a first access network device, where the information about the first signal includes at least one of the following: the received power of the first signal, or an index corresponding to the first signal; and the transceiver module is configured to send a second signal to a second access network device based on the compensation coefficient, where the transmit power of the second signal is determined based on the compensation coefficient.

[0032] Optionally, the transceiver module may include a sending module and a receiving module, wherein the sending module is used to implement the sending function of the communication device described in the third aspect, and the receiving module is used to implement the receiving function of the communication device described in the third aspect.

[0033] Optionally, the communication device described in the third aspect may further include a storage module, wherein the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device may execute the method described in the first aspect.

[0034] It can be understood that the communication device described in the third aspect can be a terminal or a network device, such as a remote device, or a chip (system) or other parts or components that can be set in a terminal or network device, or a device that includes a terminal or network device. This application does not impose any restrictions on this.

[0035] In addition, the technical effects of the communication device described in the third aspect can refer to the technical effects of the method described in the first aspect, and will not be repeated here.

[0036] In a fourth aspect, a communication device is provided. The communication device includes: a module for executing the method described in the second aspect, such as a transceiver module and a processing module. For example, the processing module is configured to obtain a second correspondence, where the second correspondence indicates a correspondence between a signal received power and a compensation coefficient value; or, the second correspondence indicates a correspondence between an index corresponding to a signal and a compensation coefficient value; or, the second correspondence indicates a correspondence between a signal received power, an index corresponding to a signal, and a compensation coefficient; and the transceiver module is configured to transmit the second correspondence.

[0037] Optionally, the transceiver module may include a sending module and a receiving module, wherein the sending module is used to implement the sending function of the communication device described in the fourth aspect, and the receiving module is used to implement the receiving function of the communication device described in the fourth aspect.

[0038] Optionally, the communication device described in the fourth aspect may further include a storage module, wherein the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device may execute the method described in the second aspect.

[0039] It can be understood that the communication device described in the fourth aspect can be a terminal or a network device, such as a remote device, or a chip (system) or other parts or components that can be set in a terminal or network device, or a device that includes a terminal or network device. This application does not impose any restrictions on this.

[0040] In addition, the technical effects of the communication device described in the fourth aspect can refer to the technical effects of the method described in the second aspect, and will not be repeated here.

[0041] In a fifth aspect, a communication device is provided, comprising: a processor configured to execute the method described in any possible implementation of the first aspect or the second aspect.

[0042] In one possible design solution, the communication device described in the fifth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fifth aspect to communicate with other communication devices.

[0043] In one possible design, the communication device described in the fifth aspect may further include a memory. The memory may be integrated with the processor or provided separately. The memory may be used to store the computer program and / or data involved in the method described in either the first aspect or the second aspect.

[0044] In an embodiment of the present application, the communication device described in the fifth aspect may be the terminal or network device described in any one of the first aspect or the second aspect, or a chip (system) or other parts or components that can be set in the terminal or the network device, or a device that includes the terminal or the network device.

[0045] In addition, the technical effects of the communication device described in the fifth aspect can refer to the technical effects of the method described in any one of the implementation methods of the first aspect or the second aspect, and will not be repeated here.

[0046] In a sixth aspect, a communication device is provided, comprising: a processor coupled to a memory, the processor configured to execute a computer program stored in the memory, so that the communication device performs the method described in any possible implementation of the first aspect or the second aspect.

[0047] In one possible design solution, the communication device described in the sixth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the sixth aspect to communicate with other communication devices.

[0048] In an embodiment of the present application, the communication device described in the sixth aspect may be the terminal or network device described in any one of the first aspect or the second aspect, or a chip (system) or other parts or components that can be set in the terminal or the network device, or a device that includes the terminal or the network device.

[0049] In addition, the technical effects of the communication device described in the sixth aspect can refer to the technical effects of the method described in any one of the implementation methods of the first aspect or the second aspect, and will not be repeated here.

[0050] In the seventh aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store a computer program, and when the processor executes the computer program, the communication device executes the method described in any one of the implementation methods of the first aspect or the second aspect.

[0051] In one possible design solution, the communication device described in the seventh aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the seventh aspect to communicate with other communication devices.

[0052] In an embodiment of the present application, the communication device described in the seventh aspect may be the terminal or network device described in any one of the first aspect or the second aspect, or a chip (system) or other parts or components that can be set in the terminal or the network device, or a device that includes the terminal or the network device.

[0053] In addition, the technical effects of the communication device described in the seventh aspect can refer to the technical effects of the method described in any one of the implementation methods of the first aspect or the second aspect, and will not be repeated here.

[0054] In the eighth aspect, a communication device is provided, which can be a first device, or a module or unit (for example, a chip, or a chip system, or a circuit) in the first device that corresponds one-to-one to the method / operation / step / action described in the first aspect, or can be used in combination with the first device.

[0055] In the ninth aspect, a communication device is provided, which may be a second device, or a module or unit (for example, a chip, or a chip system, or a circuit) in the second device that corresponds one-to-one to the method / operation / step / action described in the second aspect, or may be capable of being used in combination with the first device.

[0056] In a tenth aspect, a communication chip is provided, in which instructions are stored. When the chip runs on a communication device, the method described in any one of the implementation methods of the first aspect or the second aspect is implemented.

[0057] In the eleventh aspect, a communication chip is provided, comprising: a logic circuit and a communication interface, wherein the logic circuit is used to execute computer instructions, and the communication interface is used for the communication chip to communicate with other devices or chips, and when the logic circuit executes the computer instructions, the method described in any one of the implementation methods of the first aspect or the second aspect is implemented.

[0058] In a twelfth aspect, a communication system is provided, comprising: an apparatus for executing the method described in the first aspect, and / or an apparatus for executing the method described in the second aspect.

[0059] In a thirteenth aspect, a computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are run on a computer, the computer executes the method described in any possible implementation method of the first aspect or the second aspect.

[0060] In a fourteenth aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed on a computer, causes the computer to execute the method described in any possible implementation of the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] FIG1 is a schematic diagram of a macro-micro scene provided in an embodiment of the present application;

[0062] FIG2 is a schematic diagram of the architecture of a communication system according to an embodiment of the present application;

[0063] FIG3 is a second schematic diagram of the architecture of the communication system provided in an embodiment of the present application;

[0064] FIG4 is a flow chart of a communication method according to an embodiment of the present application;

[0065] FIG5 is a schematic diagram of a correspondence between a range of a signal receiving power of a first access network device and a value of a compensation coefficient provided by an embodiment of the present application;

[0066] FIG6 is a first schematic diagram illustrating the positions of a first access network device, a second access network device, and a terminal device according to an embodiment of the present application;

[0067] FIG7 is a first schematic diagram of the positions of a first access network device and a second access network device provided in an embodiment of the present application;

[0068] FIG8 is a second schematic diagram of the positions of the first access network device and the second access network device provided in an embodiment of the present application;

[0069] FIG9 is a second schematic diagram of the positions of the first access network device, the second access network device, and the terminal device provided in an embodiment of the present application;

[0070] FIG10 is a first structural diagram of a communication device provided in an embodiment of the present application;

[0071] FIG11 is a second structural diagram of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0072] For ease of understanding, the technical terms involved in the embodiments of this application are first introduced below.

[0073] 1. Uplink power control mechanism

[0074] In communication systems, such as the 5G New RAT (NR) system, uplink channels and signals include: physical random access channel (PRACH), physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH), and sounding reference signal (SRS). The protocol defines relevant power adjustment formulas for these uplink channels and signals. Power calculation methods vary for different channels and signals, but generally follow a broad framework: the base station calculates the terminal's transmit power control (TPC) command based on power control configuration parameters, terminal device feedback, and base station measurement information. The TPC is then transmitted to the terminal via downlink control information (DCI) on the physical downlink control channel (PDCCH). The terminal maps the TPC into a power adjustment value and determines the final uplink transmit power based on its maximum transmit power, path loss, number of resource blocks (RBs), and transmission format.

[0075] For example, on a certain uplink carrier in a certain cell, the actual transmit power of the terminal device is calculated as follows:

[0076] P = min {the maximum transmission power of the terminal device on the uplink carrier P CMAX , uplink expected transmit power};(1)

[0077] Among them, the uplink expected transmission power is the sum of open-loop power control, closed-loop power control and other adjustment quantities. The open-loop power is related to the RRC high-level parameter configuration and partial path loss compensation, and its expression is: P0(j)+α(j)*PL(q), P0(j) is the target receiving power level expected by the base station, α(j) is the partial path loss factor, and α(j) is sent to the terminal device after being configured by the base station, and PL is the path loss. Closed-loop power control is related to the historical transmission power, which can be expressed as f(l), l is the index of the closed-loop power control adjustment quantity, and the adjustment information (such as TPC) is indicated through DCI. Other adjustment quantities are related to frequency domain resource allocation and link adaptation, and its expression is: 10lg(2 μ *M)+Δ TF, μ corresponds to the subcarrier spacing used in this uplink transmission, M is the number of RBs allocated for this uplink transmission, Δ TF It is an adjustment value related to the uplink transmission format.

[0078] It can be seen that the actual transmission power of the above terminal device can also be expressed as: P = min {P CMAX ,P0(j)+α(j)*PL(q)+f(l)+10lg(2 μ *M)+Δ TF That is, after calculating the expected uplink transmission power, the terminal device compares the expected uplink transmission power with its maximum transmission power and determines the minimum transmission power of the two as the signal transmission power.

[0079] In some scenarios, the terminal device does not have historical transmission power information. In this case, the expected uplink transmission power of the terminal device can be determined by open-loop power control, that is, the uplink transmission power is determined based on information such as path loss and power control parameters provided by the base station side.

[0080] Taking the power control of the PRACH channel as an example, the base station provides the base station's transmit power and PRACH-related configurations through the system information block 1 (SIB1), such as the expected preamble receive power level, the maximum number of preamble transmissions, the power boost step size and other information. The terminal device determines the path loss between itself and the base station based on the reference signal received power (RSRP) of the received physical broadcast channel (PBCH) block (synchronization signal and PBCH block, SSB) and the transmit power of the base station broadcast in SIB1. The value of the path loss is the signal transmit power of the base station minus the reference signal received power. After determining the path loss, the terminal device can determine the transmit power of the PRACH according to the following formula: P PRACH,b,f,c (i) = min{P CMAX,F,C (i),P PRACH,target,f,c +PL b,f,c}; (2)

[0081] Among them, P PRACH,target,f,c is the target received power mentioned above, PL b,f,c is the path loss between the terminal device and the base station. As can be seen, when the terminal device has no historical transmission power information and uses open-loop power control, α(j) is 1. In other words, in this case, the terminal device's expected uplink transmit power can be determined based on the target received power and the path loss.

[0082] However, in some scenarios, such as the following scenarios 1 to 3, the terminal device cannot obtain the path loss between it and the base station.

[0083] Scenario 1: The cell's periodic broadcast signals do not include system messages, such as SIB1. That is, system messages are obtained on demand. For example, the terminal device can trigger the base station to send a system message by sending an uplink wake-up signal (UL WUS). At this time, for sending the UL WUS signal, the base station's signal transmission power cannot be obtained, and thus the path loss cannot be determined.

[0084] Scenario 2: The base station is in sleep mode, and the terminal device wakes up the base station via a UL WUS signal. In this case, since the base station is in sleep mode, no SIB1 is sent. Therefore, the terminal device cannot obtain the base station's transmit power before sending the UL WUS signal, and therefore cannot determine the outbound path loss.

[0085] Scenario 3: In the macro-micro scenario, the downlink of the micro base station can be turned on or off as needed. When the downlink of the micro base station is turned off, it will still receive the random access preamble sent by the terminal device, but in this case, the terminal device cannot obtain the signal transmission power of the micro base station, and cannot receive the downlink signal from the micro base station, so it is impossible to determine the path loss. It can be understood that as shown in Figure 1, in network deployment, the macro base station provides wide coverage, but for hot spots within its coverage area, such as office areas, stadiums and other scenarios, due to the large number of users, in order to ensure user experience, some micro base stations will be deployed accordingly. Such a scenario is a macro-micro scenario.

[0086] As can be seen, in scenarios 1-3 above, the terminal device cannot obtain the base station's transmit power, or cannot receive downlink signals from the base station. This makes it impossible for the terminal device to determine the path loss between it and the base station. In other words, the terminal device cannot determine the desired uplink transmit power through open-loop power control. To ensure that the receiving end can receive the signal, the terminal will transmit the signal at maximum transmit power, but this will result in unnecessary energy consumption and is not conducive to terminal energy conservation. Therefore, how to determine the appropriate signal transmit power when the terminal cannot determine the path loss is an urgent problem to be solved.

[0087] In response to the above technical problems, the embodiments of the present application propose the following technical solution to determine the appropriate signal transmission power when the terminal device cannot determine the path loss between it and the access network equipment.

[0088] The technical solution in this application will be described below with reference to the accompanying drawings.

[0089] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as 4th generation (4G) mobile communication systems, such as long term evolution (LTE) systems, fifth generation (5G) mobile communication systems, such as new radio (NR) systems, and communication systems evolved after 5G, such as sixth generation (6G) mobile communication systems. They can also be applied to wireless fidelity (WiFi) systems, vehicle to everything (V2X) communication systems, device-to-device (D2D) communication systems, and Internet of Vehicles communication systems.

[0090] This application will present various aspects, embodiments, or features in the context of systems that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. Furthermore, combinations of these aspects may also be used.

[0091] Additionally, in the embodiments of this application, words such as "exemplary" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete manner.

[0092] In the embodiments of the present application, "information", "signal", "message", "channel" and "signaling" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings they intend to express are matched. "of", "corresponding, relevant" and "corresponding" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings they intend to express are matched. In addition, the " / " mentioned in this application can be used to express an "or" relationship.

[0093] In the embodiments of the present application, sometimes a subscript such as W1 may be mistakenly written as a non-subscript form such as W1. When the difference is not emphasized, the meanings to be expressed are the same.

[0094] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0095] To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail using the communication system shown in Figure 2 as an example. For example, Figure 2 is a schematic diagram of the architecture of a communication system applicable to the communication method provided in the embodiments of the present application.

[0096] As shown in Figure 2, the communication system includes a terminal device, a first access network device, and a second access network device. The first access network device and the second access network device may be the same device or different devices, and this is not limited in the embodiments of the present application. When the first access network device and the second access network device are different devices, the cell of the first access network device and the cell of the second access network device may be neighboring cells; or, the first access network device is a macro base station, and the second access network device is a micro base station under the macro base station. The terminal device can refer to the relevant introduction of "terminal 120" below, and the first access network device and the second access network device can refer to the relevant introduction of "network device 110" below, which will not be repeated here.

[0097] To facilitate understanding of the embodiments of the present application, the application scenarios used in the present application are described using the communication system architecture shown in FIG3 as an example. FIG3 is a schematic diagram illustrating a possible, non-limiting system. As shown in FIG3 , a communication system 3000 includes a radio access network (RAN) 100 and a core network (CN) 200. The RAN 100 includes at least one network device (such as 110a and 110b in FIG3 , collectively referred to as 110) and at least one terminal (such as 120a-120j in FIG3 , collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in FIG3 ). The terminal 120 is wirelessly connected to the network device 110. The network device 110 is wirelessly or wiredly connected to the core network 200. The core network device in the core network 200 and the network device 110 in the RAN 100 may be different physical devices, or they may be the same physical device that integrates the core network logical functions and the radio access network logical functions.

[0098] The RAN 100 may be a cellular system related to the Third Generation Partnership Project (3GPP), such as a 4G or 5G mobile communication system, or an evolved system beyond 5G (such as a 6G mobile communication system). The RAN 100 may also be an open radio access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a WiFi system. The RAN 100 may also be a communication system that integrates two or more of the above systems.

[0099] The terminal device and network device provided in the embodiments of the present application can be applied to the network device 110 or to the terminal 120. It is understood that FIG3 only shows one possible communication system architecture that can be applied in the embodiments of the present application. In other possible scenarios, the communication system architecture can also include other devices.

[0100] The network device 110 is a node in the radio access network (RAN), which can also be called an access network device or a RAN node (or device). The network device 110 is used to help terminals achieve wireless access. The multiple network devices 110 in the communication system 3000 can be nodes of the same type or different types. In some scenarios, the roles of the network device 110 and the terminal 120 are relative. For example, the network element 120i in Figure 3 can be a helicopter or a drone, which can be configured as a mobile base station. For the terminal 120j that accesses the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal. The network device 110 and the terminal 120 are sometimes referred to as communication devices. For example, the network elements 110a and 110b in Figure 3 can be understood as communication devices with base station functions, and the network elements 120a-120j can be understood as communication devices with terminal functions.

[0101] In one possible scenario, the network device may be a base station, an evolved NodeB (eNodeB), a transmitting and receiving point (TRP), a transmitting point (TP), a next-generation NodeB (gNB), a next-generation base station in a sixth-generation (6G) mobile communication system, a base station in a future mobile communication system, a satellite, or an access point (AP) in a WiFi system, such as a home gateway, router, server, switch, bridge, etc., an integrated access and backhaul (IAB) node, a mobile switching center, or a network device in a non-terrestrial network (NTN) communication system, i.e., it may be deployed on a high-altitude platform or satellite. The network device may be a macro base station (such as 110a in FIG. 3 ), a micro base station or an indoor station (such as 110b in FIG. 3 ), a relay node or a donor node, or a wireless controller in a CRAN scenario. The network device can also be a device that acts as a base station in device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, drone communication, or machine-to-machine communication. Alternatively, the network device can be a server, wearable device, vehicle, or vehicle-mounted device. For example, the access network device in vehicle-to-everything (V2X) technology can be a roadside unit (RSU).

[0102] In another possible scenario, multiple network devices collaborate to assist the terminal in achieving wireless access, and different network devices respectively implement part of the functions of the base station. For example, the network device can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, or the CU can be divided into a network device in the core network CN, without limitation here.

[0103] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0104] In the embodiments of the present application, the form of the network device is not limited. The device used to implement the function of the network device can be a network device; it can also be a device that can support the network device to implement the function, such as a chip system. The device can be installed in the network device or used in conjunction with the network device.

[0105] Terminal 120, which may also be referred to as user equipment (UE), mobile station (MS), mobile terminal (MT), user device, access terminal, subscriber unit, subscriber station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal device, wireless communication device, user agent, or user device, may be a device used to provide voice or data connectivity to a user, or may be an IoT device. For example, terminal devices include handheld devices with wireless connectivity capabilities, vehicle-mounted devices, and the like. Currently, terminals can be: mobile phones, tablet computers, computers with wireless transceiver functions, laptops, PDAs, mobile internet devices (MIDs), wearable devices (such as smart watches, smart bracelets, pedometers, etc.), vehicle-mounted equipment (such as cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed trains, etc.), satellite terminals, virtual reality (VR) devices, augmented reality (AR) devices, smart point of sale (POS) machines, customer-premises equipment (CPE), wireless terminals in industrial control, smart home devices (such as refrigerators, televisions, air conditioners, electricity meters, etc.), intelligent robots, robotic arms, workshop equipment, wireless terminals in unmanned driving, wireless terminals in telemedicine, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, flying equipment (such as intelligent robots, hot air balloons, drones, airplanes), etc. The terminal device may also be other devices with terminal functions. For example, the terminal device may also be a device that serves as a terminal in D2D communication.

[0106] The embodiments of this application do not limit the device form factor of the terminal. The device used to implement the functions of the terminal device can be the terminal device; it can also be a device that supports the terminal device to implement the functions, such as a chip system. The device can be installed in the terminal device or used in conjunction with the terminal device. In the embodiments of this application, the chip system can be composed of a chip or include a chip and other discrete devices.

[0107] It should be noted that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of corresponding functions in other communication systems.

[0108] In a communication system, when a terminal device is unable to obtain the path loss between it and the second access network device, it can determine the transmission power of the second signal through a compensation coefficient. The compensation coefficient can be determined based on the information of the first signal, and the information of the first signal can reflect the positional relationship between the terminal device and the second access network device. In other words, the compensation coefficient can characterize the positional relationship between the terminal device and the second access network device. For example, when the first access network device and the second access network device are the same device, the terminal device can determine the compensation coefficient based on the received power of the first signal; specifically, the greater the signal received power, the closer the distance between the terminal device and the first access network device, and the smaller the compensation coefficient. In this case, the terminal device can determine the transmission power of the second signal based on the compensation coefficient and the maximum transmission power of the terminal device. For another example, when the first access network device and the second access network device are different devices, the terminal device can determine the compensation coefficient based on the index corresponding to the first signal, or the index and the received power of the first signal. At this time, the terminal device can determine the transmit power of the second signal based on the compensation coefficient and the maximum transmit power of the terminal device. Alternatively, because the terminal device can obtain the path loss between it and the first access network device, and the transmit power expected by the second access network device can be sent to the terminal device through the first access network device, the terminal device can also determine the transmit power of the second signal based on the transmit power expected by the second access network device, the compensation coefficient, and the path loss between the terminal device and the first access network device. In this way, if the terminal device cannot obtain the path loss between it and the second access network device, the terminal device can determine the appropriate transmit power of the second signal based on the compensation coefficient.

[0109] For ease of understanding, the communication method provided in the embodiment of the present application will be specifically described below with reference to FIG4 .

[0110] 4 is a flow chart of a communication method according to an embodiment of the present application. The method can be applied to communication between a terminal device, a first access network device, and a second access network device in the above communication system.

[0111] As shown in FIG4 , the process of the above communication method is as follows:

[0112] S401: The terminal device obtains a compensation coefficient.

[0113] The compensation coefficient is used to determine the transmit power of the second signal (described below) sent by the terminal device. The compensation coefficient can represent the positional relationship between the terminal device and the second access network device, and the compensation coefficient and the distance between the terminal device and the second access network device can be positively correlated. That is, the greater the distance between the terminal device and the second access network device, the greater the compensation coefficient.

[0114] The compensation coefficient is determined based on the information of the first signal sent by the first access network device. That is, the terminal device can determine the compensation coefficient based on the information of the first signal. The first signal can be a secondary synchronization signal (SSS) or other signals that can be measured by the terminal device, without limitation. The information of the first signal may include at least one of the following: the received power of the first signal, or the index corresponding to the first signal; that is, the compensation coefficient can be determined based on the received power of the first signal, or the index corresponding to the first signal, or the received power of the first signal and the index corresponding to the first signal. The received power of the first signal can also be called the reference signal received power (RSRP), which can be obtained by measuring the first signal by the terminal device. The specific measurement method can reuse the method in the prior art and will not be repeated here. The index corresponding to the first signal is the index of the beam that transmits the first signal. The specific principle of the beam can refer to the principle in the prior art and will not be repeated here.

[0115] The method for determining the compensation coefficient is related to whether the first access network device and the second access network device are the same device, which is described below in different situations.

[0116] Case 1.1: The first access network device and the second access network device are the same device.

[0117] In this case, the terminal device may determine the compensation coefficient according to the received power of the first signal, that is, the compensation coefficient is determined according to the received power of the first signal.

[0118] Specifically, the terminal device can determine the compensation coefficient based on the received power of the first signal and the second correspondence, that is, the compensation coefficient is determined based on the received power of the first signal and the second correspondence. The second correspondence is the correspondence between the value range of the received power of the first signal and the value of the compensation coefficient. The second correspondence can be pre-set or pre-defined by the protocol, or it can come from the first access network device. That is to say, the first access network device can obtain the second correspondence and send the second correspondence; accordingly, the terminal device receives the second correspondence from the first access network device. In this case, the second correspondence can be carried on at least one of the following messages: a system message, a synchronization signal, or a radio resource control (RRC) message.

[0119] It is understood that multiple different second correspondences can be pre-set or pre-defined by protocol; alternatively, the first access network device can send multiple different second correspondences. The multiple different second correspondences are multiple second correspondences between multiple value ranges of the received power of the first signal and multiple values ​​of the compensation coefficient, and the multiple value ranges correspond one-to-one with the multiple values. In this case, the terminal device can select a second correspondence corresponding to the value of the received power of the first signal from the multiple second correspondences, and then determine the compensation coefficient based on the second correspondence.

[0120] Exemplarily, as shown in FIG5 and Table 1, there are multiple second correspondences, that is, different ranges of values ​​of the received power of the first signal correspond to different values ​​of the compensation coefficient. After the terminal device determines the received power of the first signal, a second correspondence corresponding to the value of the received power of the first signal can be determined from multiple second correspondences, and then the compensation coefficient corresponding to the received power of the first signal can be determined based on the second correspondence. It can be understood that the second correspondence shown in Table 1 is only an example, and other different second correspondences can also be set, such as setting the value range of the received power of the first signal to a smaller number of second correspondences, which is not limited in the embodiments of the present application.

[0121] Table 1

[0122] For example, the received power of the first signal is -100dBm. As shown in Table 1, -100dBm is within the range of -105dBm to -95dBm. The compensation coefficient corresponding to this range is 0.95. Therefore, it can be determined that the compensation coefficient corresponding to -100dBm is 0.95.

[0123] It can be understood that the signal reception power can reflect the strength of the wireless signal, that is, the greater the signal reception power, the stronger the wireless signal; and the distance between the terminal device and the first access network device is positively correlated with the strength of the wireless signal, that is, the closer the distance, the stronger the wireless signal. Therefore, the magnitude of the received power of the first signal can reflect the distance between the terminal device and the first access network device, that is, the greater the value of the received power of the first signal, the closer the distance between the terminal device and the first access network device. Because the compensation coefficient is positively correlated with the distance between the terminal device and the first access network device, the value of the compensation coefficient is inversely correlated with the value of the received power of the first signal, that is, the greater the value of the compensation coefficient, the smaller the received power of the first signal. In this way, the value of the compensation coefficient can be determined by the received power of the first signal and the second corresponding relationship.

[0124] In one possible implementation, the terminal device obtaining the compensation coefficient (S401) may specifically include: the terminal device receiving the SSS transmitted by the first access network device; and the terminal device determining the compensation coefficient based on the received signal power of the SSS. The specific implementation of determining the compensation coefficient based on the received signal power of the SSS can be referred to the description of "Case 1" above and will not be repeated here.

[0125] For example, in the aforementioned "Scenario 1", the first access network device may periodically send a synchronization signal, which may include a primary synchronization signal (PSS) and / or an SSS. Before the terminal device needs to send a UL WUS signal to trigger the second access network device to send a system message, it may receive the SSS sent by the first access network device; determine a compensation coefficient based on the signal reception power of the SSS, and then determine the transmission power of the UL WUS signal based on the compensation coefficient.

[0126] Case 1.2: The first access network device and the second access network device are different devices.

[0127] In this case, the cell of the first access network device and the cell of the second access network device can be adjacent cells to each other, that is, the first access network device and the second access network device are adjacent devices; or, the first access network device can be a macro base station and the second access network device can be a micro base station under the macro base station, which is not limited in the embodiments of this application. The terminal device can determine the compensation coefficient based on the index corresponding to the first signal; or, the terminal device can determine the compensation coefficient based on the received power of the first signal and the index corresponding to the first signal, as described below.

[0128] Mode 1: The terminal device determines the compensation coefficient according to the index corresponding to the first signal, that is, the compensation coefficient is determined according to the index corresponding to the first signal.

[0129] Specifically, the terminal device may determine the compensation coefficient based on the index corresponding to the first signal and the second correspondence, that is, the compensation coefficient is determined based on the index corresponding to the first signal and the second correspondence. The second correspondence may be a correspondence between the index corresponding to the first signal and the value of the compensation coefficient. The method for obtaining the second correspondence can refer to the relevant introduction in the aforementioned "Case 1.1" and will not be repeated here.

[0130] It is understandable that multiple different second correspondences can be preset or predefined by protocol; alternatively, the first access network device can send multiple different second correspondences. The multiple different second correspondences are multiple second correspondences between multiple indices corresponding to the first signal and multiple values ​​of the compensation coefficient, and the multiple indices correspond one-to-one with the multiple values. The multiple indices corresponding to the first signal are indices of multiple beams that can transmit the first signal. In this case, the terminal device can select a second correspondence corresponding to the index corresponding to the first signal from the multiple second correspondences, and then determine the compensation coefficient based on the correspondence.

[0131] Exemplarily, as shown in FIG6 and Table 2, there are multiple second correspondences, that is, the indexes corresponding to different first signals correspond to different values ​​of the compensation coefficients. After the terminal device determines the index of the first signal, it can determine the second correspondence corresponding to the index from the multiple second correspondences, and then determine the compensation coefficient corresponding to the received power of the first signal based on the second correspondence. It can be understood that the second correspondence shown in Table 2 is only an example, and different multiple second correspondences can be set according to actual conditions, such as the number of beams, and the embodiments of the present application are not limited thereto.

[0132] Table 2

[0133] For example, the index corresponding to the first signal is 6. According to the corresponding relationship shown in Table 2, it can be determined that the compensation coefficient corresponding to the index is 0.9.

[0134] It can be understood that, as shown in FIG6 , the first access network device periodically sends signals through multiple different beams (such as beam #1 to beam #8 in FIG6 ), and each beam in the multiple beams has a unique index. The terminal device can determine a beam (denoted as beam #a) based on beam measurement, such as the optimal beam (such as beam #6 in FIG6 ), and receive a signal on the beam #a, such as the first signal. The beam #a can be the beam with the best quality among the multiple beams. Normally, the beam coverage range corresponding to the location of the terminal device corresponds to the beam with the best quality among the multiple beams. For example: in FIG6 , the terminal device is located within the beam coverage range of beam #6, then beam #6 is usually the beam #a measured by the terminal device. In other words, the coverage range of beam #a measured by the terminal device usually includes the location of the terminal device. Therefore, the index of the beam can reflect the approximate location of the terminal device.

[0135] After determining the index of the beam transmitting the first signal, the approximate location of the terminal device can be determined, thereby determining the distance between the terminal device and the second access network device. As shown in Figure 7, the first access network device in Figure 7 sends signals through beam #2 and beam #3. If the terminal device is within the beam coverage of beam #2, the distance between the terminal device and the second access network device can be x1; if the terminal device is within the beam coverage of beam #3, the distance between the terminal device and the second access network device can be x2. It can be seen that the index of the beam transmitting the first signal can reflect the distance between the terminal device and the second access network device. Because the compensation coefficient is positively correlated with the distance between the terminal device and the second access network device, a correspondence between the beam index and the value of the compensation coefficient can be set, and the value of the compensation coefficient can be determined by the index.

[0136] It can also be understood that the distance between the beams of the second access network device and the first access network device can be determined in a variety of ways, for example: the distance is the distance between position #1 and the second access network device, and the position #1 can be the farthest position from the first access network device within the coverage range of the beam, and the position #1 can also be the center position within the coverage range of the beam. This embodiment of the present application does not limit this.

[0137] In one possible implementation, the terminal device obtaining the compensation coefficient (S401) may specifically include: the terminal device receiving an SSS from the first access network device; and determining the compensation coefficient based on an index corresponding to the SSS. The specific implementation of determining the compensation coefficient based on the index corresponding to the SSS can be referred to the relevant description of "Method 1" above and will not be repeated here.

[0138] For example, in the aforementioned "Scenario 2," the second access network device is in a dormant state; the cell of the first access network device and the cell of the second access network device are neighboring cells, or the first access network device is a macro base station and the second access network device is a micro base station under the macro base station. The terminal device needs to send a UL WUS signal to wake up the second access network device. Before sending the UL WUS signal, the terminal device can receive the SSS of the first access network device; determine a compensation coefficient based on the index corresponding to the SSS, and then determine the transmit power of the UL WUS signal based on the compensation coefficient.

[0139] For another example, in the aforementioned "Scenario 3," the first access network device is a macro base station, the second access network device is a micro base station under the macro base station, and the downlink of the second access network is disabled. The terminal device needs to send an uplink preamble signal to access the second access network device. Before sending the uplink preamble signal, the terminal device can receive the SSS of the first access network device; based on the index corresponding to the SSS, the terminal device determines a compensation coefficient to determine the transmission power of the uplink preamble signal based on the compensation coefficient.

[0140] Method 2: The terminal device determines the compensation coefficient according to the received power of the first signal and the index corresponding to the first signal, that is, the compensation coefficient is determined according to the received power of the first signal and the index corresponding to the first signal.

[0141] Specifically, the terminal device can determine the compensation coefficient based on the received power of the first signal, the index corresponding to the first signal, and the second corresponding relationship, that is, the compensation coefficient is determined based on the received power of the first signal, the index corresponding to the first signal, and the second corresponding relationship. The second corresponding relationship is the correspondence between the value range of the received power of the first signal, the index corresponding to the first signal, and the compensation coefficient. The method for obtaining the second corresponding relationship can refer to the relevant introduction in the aforementioned "Case 1.1", which will not be repeated here.

[0142] It can be understood that multiple different second correspondences can be preset or predefined by protocol; or, the first access network device can send multiple different second correspondences. The multiple different second correspondences are M correspondences of N value ranges of the received power of the first signal, M indexes corresponding to the first signal, and M values ​​of the compensation coefficient. Each value range in the N value ranges corresponds to the M indexes and the M value parts. The M indexes correspond one-to-one with the M values. The M indexes are the indices of the M beams that can transmit the first signal. N is an integer greater than 1, and M is an integer greater than or equal to N. In this case, the terminal device can determine the second correspondence corresponding to the value and the index from the M second correspondences based on the value of the received power of the first signal and the index corresponding to the first signal, and then determine the compensation coefficient based on the second correspondence.

[0143] Exemplarily, as shown in FIG8 and Table 3, there are multiple second correspondences, that is, different ranges of values ​​of the received power of the first signal and indexes corresponding to the first signal correspond to different values ​​of the compensation coefficients. After the terminal device determines the value of the received power of the first signal and the index corresponding to the first signal, a second correspondence corresponding to the value and the index can be determined from the multiple second correspondences, and then the corresponding compensation coefficient can be determined based on the second correspondence. It can be understood that the second correspondence shown in Table 3 is only an example, and different multiple second correspondences can be set according to actual conditions, and the embodiments of the present application do not limit this.

[0144] Table 3

[0145] For example, the information receiving power of the first signal is -90 dBm, and the index of the first signal is 1. According to the corresponding relationship shown in Table 2, it can be determined that the compensation coefficient corresponding to the index is 0.84.

[0146] It can be understood that the received power of the first signal can reflect the distance between the terminal device and the first access network device, and the index corresponding to the first signal can reflect the approximate location of the terminal device. Therefore, the approximate location of the terminal device can be determined by the received power of the first signal and the index corresponding to the first signal, thereby determining the distance between the terminal device and the second access network device. For the received power of the first signal, please refer to the relevant introduction of "Case 1" above, and for the index corresponding to the first signal, please refer to the relevant introduction of "Method 1" above, which will not be repeated here.

[0147] For example, as shown in Figure 9, the cell of the first access network device can be divided according to the signal receiving power and the beam coverage of different beams. Regions 1 to 3 in Figure 9 are determined based on different signal receiving power ranges. Region 1 is a region with a signal receiving power greater than -85dBm, Region 2 is a region with a signal receiving power between -85dBm and -105dBm, and Region 3 is a region with a signal receiving power less than -105dBm. If the terminal device is located in Region 2 and is within the beam coverage corresponding to Beam #3, the distance between the terminal device and the second access network device is x11; if the terminal device is located in Region 3 and is within the beam coverage corresponding to Beam #3, the distance between the terminal device and the second access network device is x22.

[0148] Since the compensation coefficient is positively correlated with the distance between the terminal device and the second access network equipment, the compensation coefficient can be determined by determining the value of the compensation coefficient through the second corresponding relationship, the received power of the first signal, and the index corresponding to the first signal.

[0149] In one possible implementation, the terminal device obtaining the compensation coefficient (S401) may specifically include: receiving an SSS from the first access network device; and determining the compensation coefficient based on a received signal power of the SSS and an index corresponding to the SSS. The specific implementation of determining the compensation coefficient based on the received signal power of the SSS and the index corresponding to the SSS can be referred to the relevant description of "Method 2" above and will not be repeated here.

[0150] For example, in the aforementioned "Scenario 2," the second access network device is in a dormant state; the cell of the first access network device and the cell of the second access network device are neighboring cells, or the first access network device is a macro base station and the second access network device is a micro base station under the macro base station. The terminal device needs to send a UL WUS signal to wake up the second access network device. Before sending the UL WUS signal, the terminal device can receive the SSS of the first access network device; based on the signal reception power of the SSS and the index corresponding to the SSS, a compensation coefficient is determined to determine the transmit power of the UL WUS signal based on the compensation coefficient.

[0151] For another example, in the aforementioned "Scenario 3," the first access network device is a macro base station, the second access network device is a micro base station under the macro base station, and the downlink of the second access network is disabled. The terminal device needs to send an uplink preamble signal to access the second access network device. Before sending the uplink preamble signal, the terminal device can receive the SSS of the first access network device; based on the signal reception power of the SSS and the index corresponding to the SSS, a compensation coefficient is determined to determine the transmission power of the uplink preamble signal based on the compensation coefficient.

[0152] It can be understood that the above content introduces the determination of the compensation coefficient based on the information of the first signal. In different scenarios, the second corresponding relationship can be carried in different messages. For example, for the aforementioned "Scenario 1", the first access network device can periodically send a synchronization signal, which includes a PSS and / or SSS. Therefore, the second corresponding relationship can be carried in the synchronization signal. Specifically, a variety of different second corresponding relationships can be pre-set, and each second corresponding relationship corresponds to a bit number, and the current second corresponding relationship used is determined by the different number of bits carried by the synchronization signal. For another example, for the aforementioned "Scenario 2" and "Scenario 3", when the second access network device is dormant, or the second access network device is a micro base station and the downlink is turned off, the terminal device can receive SSBs, system messages and RRC messages from the first access network device. In this case, the second corresponding relationship can be carried in the SSB, the system message, or the RRC message.

[0153] In addition, when the first access network device and the second access network device are the same device, the terminal device obtaining the compensation coefficient (S401) may specifically include: the terminal device receiving the SSS sent by the first access network device; and the terminal device determining the compensation coefficient based on the signal reception power of the SSS and the second corresponding relationship. When the first access network device and the second access network device are different devices, the terminal device obtaining the compensation coefficient (S401) may specifically include: the terminal device receiving the SSS sent by the first access network device; and determining the compensation coefficient based on the index corresponding to the SSS and the second corresponding relationship; or, determining the compensation coefficient based on the signal reception power of the SSS, the index corresponding to the SSS, and the second corresponding relationship.

[0154] It can also be understood that the compensation coefficient can also be determined based on other information. For example, the signal coverage range of the first access network device can be divided into multiple areas according to longitude and latitude, and each area corresponds to a unique area tag. The terminal device can obtain the area tag of the area to which its location belongs, thereby obtaining the compensation coefficient corresponding to the area tag. The correspondence between different area tags and the values ​​of the compensation coefficient can be preset or predefined by the protocol, and is not limited here. For another example, the compensation coefficient can also be determined based on the reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR) or signal-to-noise ratio (SNR). That is, the compensation coefficient can be determined by the signal quality characterized by RSRQ, SINR or SNR. The specific implementation of this method is similar to the principle of determining the compensation coefficient based on the received power of the first signal in the aforementioned "Case 1.1". Please refer to the relevant introduction of the aforementioned "Case 1.1" and "Case 1.2", which will not be repeated here.

[0155] S402: The terminal device sends a second signal to the second access network device according to the compensation coefficient.

[0156] The second signal can have different functions in different scenarios. For example, in the aforementioned "Scenario 1", the second signal can be used to request the second access network device to send a system message; or, in the aforementioned "Scenario 2", the second signal can be used to wake up the second access network device in a dormant state; or, in the aforementioned "Scenario 3", the second signal can be used for random access without restriction.

[0157] The transmission power of the second signal is determined according to the compensation coefficient. That is, the terminal device may determine the transmission power of the second signal according to the compensation coefficient before sending the second signal to the second access network device.

[0158] Specifically, the terminal device can determine the transmission power of the second signal based on the maximum transmission power of the terminal device and the compensation coefficient. That is, in this case, the transmission power of the second signal is determined based on the maximum transmission power of the terminal device and the compensation coefficient. Alternatively, the terminal device can determine the compensation coefficient based on the expected signal reception power of the second access network device, the path loss between the terminal device and the first access network device, and the compensation coefficient. That is, in this case, the transmission power of the second signal is determined based on the expected signal reception power of the second access network device, the path loss between the terminal device and the first access network device, and the compensation coefficient. The following explains different situations.

[0159] Case 2.1: The terminal device determines the transmission power of the second signal according to the maximum transmission power of the terminal device and the compensation coefficient.

[0160] The maximum transmit power is the maximum uplink transmit power corresponding to the power level of the terminal device, and the power level is the maximum output power of any transmission bandwidth within the channel bandwidth of the NR carrier. The specific principle of the maximum transmit power can refer to the principles in the prior art and will not be repeated here. The terminal device can obtain the maximum transmit power through an RRC message configured with the maximum transmit power on each carrier, or use the maximum transmit power predefined by the protocol. For example: in the aforementioned "Scenario 1", since the terminal device has no configuration information, the maximum transmit power predefined by the protocol can be used; for example: in the aforementioned "Scenario 2", the terminal device can obtain the maximum transmit power through an RRC message. In other words, the terminal device can flexibly choose different ways to obtain the maximum transmit power according to actual conditions.

[0161] After obtaining the maximum transmit power, the terminal device may determine an expected uplink transmit power based on its maximum transmit power and the compensation coefficient, where the expected uplink transmit power is the product of the maximum transmit power and the compensation coefficient. After determining the expected uplink transmit power, the terminal device may compare the expected uplink transmit power with the maximum transmit power of the terminal device and use the minimum of the two as the transmit power of the second signal.

[0162] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,α1·P CMAX}; (3)

[0163] Wherein, P is the transmission power of the second signal, P CMAX is the maximum transmission power of the terminal device, and α1 is the compensation coefficient. CMAX ,α1·P CMAX} indicates that from P CMAX and α1·P CMAX Select the smallest value among them.

[0164] Optionally, the terminal device may determine the transmit power of the second signal based on the maximum transmit power of the terminal, the compensation coefficient, and at least one of the following: power boost compensation or a first power offset (described below). That is, the transmit power of the second signal is determined based on the maximum transmit power of the terminal device, the compensation coefficient, and at least one of the following: power boost compensation or a first power offset. The following describes each method for determining the transmit power of the second signal.

[0165] In a first possible implementation, the terminal device determines the transmit power of the second signal based on the terminal's maximum transmit power, the compensation coefficient, and the power boost offset. That is, the transmit power of the second signal is determined based on the terminal device's maximum transmit power, the compensation coefficient, and the power boost step size.

[0166] The power boost step is the power added when the second signal is retransmitted, which can represent the power difference between two adjacent signals. Therefore, the power boost step can also be called the retransmission power boost step. For example, if the power boost step is 3dBm, the second signal and signal #1 are two adjacent signals sent, and signal #1 is sent before the second signal, and the transmission power of signal #1 is v, then the transmission power of the second signal is v+3. For another example, if the power boost step is 3dBm, the transmission power of the initially transmitted signal #11 is x, and the second signal is the second retransmitted signal, then the transmission power of the second signal is x+6.

[0167] The power boost step size may be pre-set or pre-defined by a protocol, or may be sent by the first access network device. For example, information about the power boost step size value may be carried in a synchronization signal, a system message, or an RRC message, and the first access network device broadcasts the synchronization signal, system message, or RRC message. It will be appreciated that the method for obtaining the power boost step size value may be flexibly set based on actual circumstances.

[0168] Specifically, when the second signal is a retransmission signal, the terminal device can determine an expected uplink transmission power based on its maximum transmission power, compensation coefficient and power boost step size. The expected uplink transmission power is the product of the maximum transmission power and the compensation coefficient, and the sum of the power boost step size. After determining the expected uplink transmission power, the terminal device can compare the expected uplink transmission power with the maximum transmission power of the terminal device, and take the minimum value between the expected uplink transmission power and the maximum transmission power of the terminal device as the transmission power of the second signal. In this way, the reliability of the second signal can be improved by increasing the power boost step size, that is, the possibility of the second access network device successfully receiving the second signal can be increased.

[0169] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,α1·P CMAX +Δ1}; (4)

[0170] Among them, Δ1 is the power increase step size, min{P CMAX ,α1·P CMAX +Δ1} indicates that the CMAX and α1·P CMAX Select the smallest value among +Δ1.

[0171] In a second possible implementation, the terminal device determines the transmit power of the second signal based on the maximum transmit power of the terminal, the compensation coefficient, and the first power offset. That is, the transmit power of the second signal is determined based on the maximum transmit power of the terminal device, the compensation coefficient, and the first power offset.

[0172] The first power offset is determined based on the service information of the terminal device, that is, the terminal device can determine the first power offset based on its service information. The service information can indicate the urgency of the service that the terminal device is about to send, such as the delay requirement of the service, etc. The service information can be the quality of service (QoS) of the service or other information that can indicate the urgency of the service. The embodiment of the present application does not limit this. It can be understood that if the service is more urgent, the terminal device expects the second access network device to receive the second signal faster, and therefore, the first power offset is larger at this time.

[0173] Specifically, the terminal device can determine the first power offset based on its service information and the first correspondence, that is, the first power offset is determined based on the service information of the terminal device and the first correspondence. The first correspondence is the correspondence between the service information of the terminal device and the value of the first power offset. The first correspondence can be pre-set or pre-defined by the protocol, or it can come from the first access network device. That is to say, the first access network device can obtain the first correspondence and send the first correspondence; accordingly, the terminal device receives the first correspondence from the first access network device. In this case, the first correspondence can be carried on at least one of the following messages: a system message, a synchronization signal, or an RRC message.

[0174] It is understood that multiple different first correspondences may be pre-set or pre-defined by a protocol; alternatively, the first access network device may send multiple different first correspondences. The multiple different first correspondences are multiple correspondences between multiple different types of service information and multiple values ​​of the first power offset, where the multiple types of service information correspond one-to-one with the multiple values. In this case, the terminal device may select, based on its service information, from the multiple first correspondences a first correspondence corresponding to its service information, and then determine the first power offset based on the first correspondence.

[0175] For example, as shown in Table 4, there are multiple first correspondences in Table 4, and the 5QI (5G QoS Identifier) ​​in Table 4 is used to indicate the QoS level. It can be seen that 82-85 correspond to low-latency services, that is, the services are more urgent, so the first power offset can be set to a larger value, such as 3dBm; 80 corresponds to medium-latency services, that is, the urgency of the services is general, so the first power offset can be set to a medium value, such as 2dBm; 1-4, 71-76 correspond to services that are not sensitive to latency, that is, the services are not too urgent, so the first power offset can be set to a smaller value, such as 1dBm; 40 corresponds to services that have no requirements for latency, that is, the services are not urgent, so the first power offset can be set to 0. It can be understood that the first correspondence shown in Table 4 is only an example, and different first correspondences can be set according to actual conditions, and the embodiments of the present application are not limited thereto.

[0176] Table 4

[0177] It can be understood that in 4G, the QoS level is characterized by the QoS class identifier (QCI), and in 5G, the QoS level is characterized by 5QI. In future communication systems, other named parameters may be used to characterize the QoS level, and the embodiments of the present application do not limit this.

[0178] After obtaining the first power offset, the terminal device can determine an expected uplink transmit power based on its maximum transmit power, the compensation coefficient, and the first power offset. The expected uplink transmit power is the product of the maximum transmit power, the compensation coefficient, and the sum of the first power offset. After determining the expected uplink transmit power, the terminal device can compare the expected uplink transmit power with the maximum transmit power of the terminal device, and use the minimum value between the expected uplink transmit power and the maximum transmit power of the terminal device as the transmit power of the second signal. In this way, the terminal device can adjust the transmit power of the second signal according to the urgency of the service to be sent. For example, the more urgent the service, the greater the transmit power of the second signal, so as to improve the reliability of the second signal.

[0179] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,α1·P CMAX +Δ2}; (5)

[0180] Wherein, Δ2 is the first power offset, min{P CMAX ,α1·P CMAX +Δ2} indicates that the CMAX and α1·P CMAX Select the smallest value among +Δ2.

[0181] In a third possible implementation, the terminal device determines the transmit power of the second signal based on the terminal's maximum transmit power, the compensation coefficient, the power boost compensation, and the first power offset. That is, the transmit power of the second signal is determined based on the terminal device's maximum transmit power, the compensation coefficient, the power boost step size, and the first power offset.

[0182] The power boost step size and the first power offset amount can refer to the aforementioned related content and will not be repeated here.

[0183] Specifically, when the second signal is a retransmission signal and the terminal device has a service to be sent, the terminal device can determine an uplink expected transmission power based on its maximum transmission power, compensation coefficient, power boost step and first power bias. The uplink expected transmission power is the product of the maximum transmission power and the compensation coefficient, the power boost step and the sum of the first power bias. After determining the uplink expected transmission power, the terminal device can compare the uplink expected transmission power with the maximum transmission power of the terminal device, and take the minimum value between the uplink expected transmission power and the maximum transmission power of the terminal device as the transmission power of the second signal. In this way, the transmission power of the second signal can be adjusted by the power boost step and the first power bias according to actual conditions, thereby improving the reliability of the second signal.

[0184] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,α1·P CMAX +Δ1+Δ2}; (6)

[0185] Among them, Δ1 is the power increase step, Δ2 is the first power offset, min{P CMAX ,α1·P CMAX +Δ1+Δ2} represents the CMAX and α1·P CMAX Select the smallest value among +Δ1+Δ2.

[0186] Case 2.2: The terminal device may determine the compensation coefficient according to the signal reception power expected by the second access network device, the path loss between the terminal device and the first access network device (denoted as path loss #1), and the compensation coefficient.

[0187] The signal reception power expected by the second access network device is configured by a higher layer and may be sent by the first access network device to the terminal device. For example, the signal reception power may be carried in a synchronization signal, a system message, or an RRC message. It is understood that multiple different signal reception powers expected by the second access network device may be preset, with each signal reception power corresponding to a bit number, so that the signal reception power expected by the second access network device can be determined based on the different bit numbers carried in the synchronization signal.

[0188] Path loss #1 can be determined based on the signal transmission power of the first access network device (denoted as signal transmission power #1) and the signal reception power of the signal received by the terminal device from the first access network device (denoted as signal reception power #1). Signal transmission power #1 can be carried in the signal periodically sent by the first access network device, such as carried in a system message (such as SIB1), so that the terminal device can obtain signal transmission power #1 by receiving the signal. Signal reception power #1 can be obtained by measuring the SSS sent by the first access network device. After obtaining the signal transmission power #1 and the signal reception power #1, the terminal device can subtract the signal reception power #1 from the signal transmission power #1 to obtain path loss #1.

[0189] The terminal device can multiply path loss #1 by the compensation coefficient to obtain the path loss between it and the second access network device (recorded as path loss #2). The terminal device can then add path loss #2 to the expected signal reception power of the second access network device to obtain an expected uplink transmit power. After determining the expected uplink transmit power, the terminal device can compare the expected uplink transmit power with the maximum transmit power of the terminal device and use the smaller of the two as the transmit power of the second signal.

[0190] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,P e +α2·PL}; (7)

[0191] Wherein, P is the transmission power of the second signal, P CMAX is the maximum transmit power of the terminal device, P e is the signal receiving power expected by the second access network device, α2 is the compensation coefficient, and PL is the path loss #1. min{P CMAX ,P e +α2·PL} represents the CMAX and P e Select the smallest value among +α2·PL.

[0192] Optionally, the terminal device can determine the transmission power of the second signal based on the signal reception power expected by the second access network device, path loss #1, compensation coefficient, and at least one of the following: power boost step, first power offset, or first adjustment amount (described below). That is, the transmission power of the second signal is determined based on the signal reception power expected by the second access network device, path loss #1, compensation coefficient, and at least one of the following: power boost step, first power offset, or first adjustment amount. The power boost step and the first power offset can be referred to the relevant introduction in the aforementioned "Case 2.1", which will not be repeated here. The following describes each method for determining the transmission power of the second signal.

[0193] In a first possible implementation, the terminal device determines the transmit power of the second signal based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, and the power boost step size. That is, the transmit power of the second signal is determined based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, and the power boost step size.

[0194] Specifically, when the second signal is a retransmission signal, the terminal device can determine an expected uplink transmission power based on the signal reception power expected by the second access network device, path loss #1, compensation coefficient and power boost step size. The expected uplink transmission power is the product of path loss #1 and the compensation coefficient, the sum of the signal reception power expected by the second access network device and the power boost step size. After determining the expected uplink transmission power, the terminal device can compare the expected uplink transmission power with the maximum transmission power of the terminal device, and take the minimum value between the expected uplink transmission power and the maximum transmission power of the terminal device as the transmission power of the second signal. In this way, the reliability of the second signal can be improved by increasing the power boost step size, that is, the possibility of the second access network device successfully receiving the second signal can be increased.

[0195] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,P e +α2·PL+Δ1}; (8)

[0196] Among them, Δ1 is the power increase step size, min{P CMAX ,P e +α2·PL+Δ1} represents the CMAX and P e Select the smallest value among +α2·PL+Δ1.

[0197] In a second possible implementation, the terminal device determines the transmit power of the second signal based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, and the first power offset. That is, the transmit power of the second signal is determined based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, and the first power offset.

[0198] Specifically, when the terminal device has a service to be sent, a first power offset can be determined based on the service information of the service, such as QoS; and then an uplink expected transmission power can be determined based on the signal reception power expected by the second access network device, path loss #1, compensation coefficient and the first power offset. The uplink expected transmission power is the product of path loss #1 and the compensation coefficient, the signal reception power expected by the second access network device, and the sum of the first power offset. After determining the uplink expected transmission power, the terminal device can compare the uplink expected transmission power with the maximum transmission power of the terminal device, and take the minimum value between the uplink expected transmission power and the maximum transmission power of the terminal device as the transmission power of the second signal. In this way, the terminal device can adjust the transmission power of the second signal according to the urgency of the service to be sent. For example, the more urgent the service is, the greater the transmission power of the second signal is, so as to improve the reliability of the second signal.

[0199] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,P e +α2·PL+Δ2}; (9)

[0200] Wherein, Δ2 is the first power offset, min{P CMAX ,P e +α2·PL+Δ2} represents the CMAX and P e Select the smallest value among +α2·PL+Δ2.

[0201] In a third possible implementation, the terminal device determines the transmit power of the second signal based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, and the first adjustment amount. That is, the transmit power of the second signal is determined based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, and the first adjustment amount.

[0202] The first adjustment amount is a power adjustment amount related to the frequency domain resource allocation and link adaptation corresponding to the second signal, and is related to the number of RBs used to transmit the second signal. It will be understood that the number of RBs used to transmit the second signal can be fixed or dynamically changing, i.e., the RB data used for each transmission may be different. When the number of RBs is a fixed value, the value of the number of RBs can be preset or predefined by a protocol, or the value of the number of RBs can be sent by the first access network device; when the number of RBs changes dynamically, the value of the number of RBs can be sent by the first access network device.

[0203] Specifically, the terminal device may determine an expected uplink transmit power based on the second access network device's expected signal receive power, path loss #1, the compensation coefficient, and the first adjustment amount. The expected uplink transmit power is the product of path loss #1 and the compensation coefficient, the sum of the second access network device's expected signal receive power, and the first adjustment amount. After determining the expected uplink transmit power, the terminal device may compare the expected uplink transmit power with the terminal device's maximum transmit power and use the smaller of the two as the transmit power of the second signal.

[0204] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,P e +α2·PL+10log 10 (2 μ ·M RB )}; (10)

[0205] Among them, 10log 10 (2 μ ·M RB ) is the first adjustment amount, μ is the subcarrier spacing used to transmit the second signal, M RB The number of RBs occupied by the second signal, min{P CMAX ,P e +α2·PL+Δ3} represents the CMAX and P e +α2·PL+10log 10 (2 μ ·M RB ) selects the smallest value.

[0206] In a fourth possible implementation, the terminal device determines the transmit power of the second signal based on the expected received signal power of the second access network device, path loss #1, the compensation coefficient, the power boost step size, and the first power offset. That is, the transmit power of the second signal is determined based on the expected received signal power of the second access network device, path loss #1, the compensation coefficient, the power boost step size, and the first power offset.

[0207] Specifically, when the second signal is a retransmission signal and the terminal device has a service to be sent, the terminal device can determine an expected uplink transmission power based on the signal reception power expected by the second access network device, path loss #1, compensation coefficient, power increase step size, and first power offset. The expected uplink transmission power is the product of path loss #1 and the compensation coefficient, the expected signal reception power of the second access network device, the power increase step size, and the first power offset. After determining the expected uplink transmission power, the terminal device can compare the expected uplink transmission power with the maximum transmission power of the terminal device, and use the minimum value between the expected uplink transmission power and the maximum transmission power of the terminal device as the transmission power of the second signal.

[0208] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,P e +α2·PL+Δ1+Δ2}; (11)

[0209] Among them, Δ1 is the power increase step, Δ2 is the first power offset, min{P CMAX ,P e +α2·PL+Δ1+Δ2} represents the CMAX and P e Select the smallest value among +α2·PL+Δ1+Δ2.

[0210] In a fifth possible implementation, the terminal device determines the transmit power of the second signal based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, the power increase step size, and the first adjustment amount. That is, the transmit power of the second signal is determined based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, the power increase step size, and the first adjustment amount.

[0211] Specifically, when the second signal is a retransmission signal, the terminal device may determine an expected uplink transmit power based on the signal reception power expected by the second access network device, path loss #1, compensation coefficient, power boost step size, and first adjustment amount. The expected uplink transmit power is the product of path loss #1 and the compensation coefficient, the sum of the signal reception power expected by the second access network device, the power boost step size, and the first adjustment amount. After determining the expected uplink transmit power, the terminal device may compare the expected uplink transmit power with the maximum transmit power of the terminal device and use the smaller of the two as the transmit power of the second signal.

[0212] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,P e +α2·PL+Δ1+10log10 (2 μ ·M RB )}; (12)

[0213] Among them, Δ1 is the power increase step size, 10log 10 (2 μ ·M RB ) is the first adjustment amount, μ is the subcarrier spacing used to transmit the second signal, M RB The number of RBs occupied by the second signal, min{P CMAX ,P e +α2·PL+Δ1+10log 10 (2 μ ·M RB )} means from P CMAX and P e +α2·PL+Δ1+10log 10 (2 μ ·M RB ) selects the smallest value.

[0214] In a sixth possible implementation, the terminal device determines the transmit power of the second signal based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, the first power offset, and the first adjustment value. That is, the transmit power of the second signal is determined based on the second access network device's expected received signal power, path loss #1, the compensation coefficient, the first power offset, and the first adjustment value.

[0215] Specifically, when the terminal device has a service to be transmitted, the terminal device may determine an expected uplink transmit power based on the signal reception power expected by the second access network device, path loss #1, the compensation coefficient, the first power offset, and the first adjustment amount. The expected uplink transmit power is the product of path loss #1 and the compensation coefficient, the sum of the signal reception power expected by the second access network device, the first power offset, and the first adjustment amount. After determining the expected uplink transmit power, the terminal device may compare the expected uplink transmit power with the maximum transmit power of the terminal device and use the smaller of the two as the transmit power of the second signal.

[0216] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,P e +α2·PL+Δ2+10log 10 (2 μ ·M RB )}; (13)

[0217] Where, Δ2 is the first power offset, 10log 10(2 μ ·M RB ) is the first adjustment amount, μ is the subcarrier spacing used to transmit the second signal, M RB The number of RBs occupied by the second signal, min{P CMAX ,P e +α2·PL+Δ2+10log 10 (2 μ ·M RB )} means from P CMAX and P e +α2·PL+Δ2+10log 10 (2 μ ·M RB ) selects the smallest value.

[0218] In a seventh possible implementation, the terminal device may determine the transmit power of the second signal based on the signal receive power expected by the second access network device, path loss #1, the compensation coefficient, the power increase step size, the first power offset, and the first adjustment amount. That is, the transmit power of the second signal is determined based on the signal receive power expected by the second access network device, path loss #1, the compensation coefficient, the power increase step size, the first power offset, and the first adjustment amount.

[0219] Specifically, when the second signal is a retransmission signal and the terminal device has a service to be sent, the terminal device can determine an expected uplink transmission power based on the signal reception power expected by the second access network device, path loss #1, compensation coefficient, power boost step, first power bias and first adjustment amount. The expected uplink transmission power is the product of path loss #1 and the compensation coefficient, the sum of the signal reception power expected by the second access network device, power boost step, first power bias and first adjustment amount.

[0220] In this case, the transmission power of the second signal can be expressed as: P = min {P CMAX ,P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB )}; (14)

[0221] Among them, Δ1 is the power increase step size, Δ2 is the first power offset, 10log 10 (2 μ ·M RB ) is the first adjustment amount, μ is the subcarrier spacing used to transmit the second signal, M RB The number of RBs occupied by the second signal, min{P CMAX ,P e +α2·PL+Δ1+Δ2+10log10 (2 μ ·M RB )} means from P CMAX and P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB ) selects the smallest value.

[0222] As you can understand, the above describes various methods for determining the transmit power of the second signal. It can be seen that, regardless of which method is used, the transmit power of the second signal is less than or equal to the maximum transmit power of the terminal device. In other words, the transmit power of the second signal is at most equal to the maximum transmit power of the terminal device. This ensures that the terminal device successfully transmits the second signal.

[0223] It is also understood that the message sent by the first access network device (such as a system message, synchronization signal, or RRC message) may carry at least two of the following information: the first correspondence, the second correspondence, the signal reception power expected by the second access network device, and the signal transmission power of the first access network device. In other words, the terminal device can obtain multiple pieces of information from a single message from the first access network device. In addition, the terminal device may obtain multiple pieces of information from multiple messages from the first access network device, and this application does not impose any restrictions on this.

[0224] In summary, the compensation coefficient can be determined based on the information of the first signal (such as the received power of the first signal and / or the index corresponding to the first signal). Since the information of the first signal can reflect the positional relationship between the terminal device and the second access network device, the compensation coefficient can represent the positional relationship between the terminal device and the second access network device. After the terminal device obtains the compensation coefficient, the transmission power of the second signal can be determined based on the compensation coefficient and the maximum transmission power of the terminal device; or, the transmission power of the second signal can be determined based on the transmission power expected by the second access network device, the compensation coefficient, and the path loss between the terminal device and the first access network device. In this way, when the terminal device cannot obtain the path loss between it and the second access network device, the terminal device can determine the appropriate transmission power of the second signal based on the compensation coefficient.

[0225] The communication method provided by the embodiment of the present application is described in detail above in conjunction with Figures 4 to 9. The communication device for executing the communication method provided by the embodiment of the present application is described in detail below in conjunction with Figures 10 and 11.

[0226] Figure 10 is a structural diagram of a communication device according to an embodiment of the present application. As shown in Figure 10 , the communication device 1000 includes a processing module 1001 and a transceiver module 1002. For ease of illustration, Figure 10 only shows the main components of the communication device.

[0227] In some embodiments, the communication device 1000 may be applicable to the communication system shown in FIG. 2 , and perform the functions of the terminal device in the communication method shown in FIG. 4 .

[0228] Among them, the processing module 1001 is used to obtain a compensation coefficient; the compensation coefficient is determined based on information of a first signal sent by a first access network device, and the information of the first signal includes at least one of the following: the receiving power of the first signal, or the index corresponding to the first signal; the transceiver module 1002 is used to send a second signal to the second access network device based on the compensation coefficient; the transmission power of the second signal is determined based on the compensation coefficient.

[0229] In one possible design, the transmit power of the second signal is determined based on a maximum transmit power of the terminal device and a compensation coefficient.

[0230] Optionally, the transmission power of the second signal is determined based on the maximum transmission power, compensation coefficient and power boost step of the terminal device; or, the transmission power of the second signal is determined based on the maximum transmission power, compensation coefficient and first power offset of the terminal device; or, the transmission power of the second signal is determined based on the maximum transmission power, compensation coefficient, power boost step and first power offset of the terminal device; wherein the power boost step is the power increased when the second signal is retransmitted, and the first power offset is determined based on the service information of the terminal device.

[0231] Furthermore, the transmission power of the second signal is expressed as: P = min {P CMAX ,α1·P CMAX +Δ1+Δ2}; where P is the transmission power of the second signal, P CMAX is the maximum transmit power of the terminal device, α1 is the compensation coefficient, Δ1 is the power increase step size, Δ2 is the first power offset, min{P CMAX ,α1·P CMAX +Δ1+Δ2} represents the CMAX and α1·P CMAX Select the smallest value among +Δ1+Δ2.

[0232] In one possible design, the transmission power of the second signal is determined based on the signal reception power expected by the second access network device, the path loss between the terminal device and the first access network device, and a compensation coefficient.

[0233] Optionally, the transmission power of the second signal is determined based on the signal receiving power, path loss, compensation coefficient and power increase step expected by the second access network device; or, the transmission power of the second signal is specifically determined based on the signal receiving power, path loss, compensation coefficient and first power offset expected by the second access network device; or, the transmission power of the second signal is specifically determined based on the signal receiving power, path loss, compensation coefficient and first adjustment amount expected by the second access network device; or, the transmission power of the second signal is specifically determined based on the signal receiving power, path loss, compensation coefficient, power increase step and first power offset expected by the second access network device; or, the transmission power of the second signal is specifically determined based on the signal receiving power, path loss, compensation coefficient, power increase step and first power offset expected by the second access network device. The expected signal receiving power, path loss, compensation coefficient, power boost step and first adjustment amount are determined; or, the transmission power of the second signal is specifically determined based on the expected signal receiving power, path loss, compensation coefficient, first power offset and first adjustment amount of the second access network device; or, the transmission power of the second signal is specifically determined based on the expected signal receiving power, path loss, compensation coefficient, power boost step, first power offset and first adjustment amount of the second access network device; wherein, the power boost step is the power increased when the second signal is retransmitted, the first power offset is determined based on the service information of the terminal device, and the first adjustment amount is the power adjustment amount related to the frequency domain resource allocation and link adaptation corresponding to the second signal.

[0234] Furthermore, the transmission power of the second signal is expressed as: P = min {P CMAX ,P e +α2·PL+Δ1}; where P is the transmission power of the second signal, P CMAX is the maximum transmit power of the terminal device, P e is the signal receiving power expected by the second access network device, α2 is the compensation coefficient, PL is the path loss, Δ1 is the power increase step size, min{P CMAX ,P e +α2·PL+Δ1} represents the CMAX and P e Select the smallest value among +α2·PL+Δ1.

[0235] Furthermore, the transmission power of the second signal is expressed as: P = min {P CMAX ,P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB )}; wherein, P is the transmission power of the second signal, P CMAX is the maximum transmit power of the terminal device, P eis the signal receiving power expected by the second access network device, α2 is the compensation coefficient, PL is the path loss, Δ1 is the power increase step size, Δ2 is the first power offset, 10log 10 (2 μ ·M RB ) is the first adjustment amount, μ corresponds to the subcarrier spacing used to transmit the second signal, M RB The number of resource blocks RB occupied by the second signal, min{P CMAX ,P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB )} means from P CMAX and P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB ) selects the smallest value.

[0236] Furthermore, the first power offset is determined according to a first correspondence between service information of the terminal device and a value of the first power offset.

[0237] Furthermore, the first corresponding relationship comes from the first access network device, and the first corresponding relationship is carried on at least one of the following messages: a system message, a synchronization signal, or an RRC message; or, the first corresponding relationship is predefined by the protocol.

[0238] In one possible design scheme, the processing module 1001 is specifically used to determine the compensation coefficient based on the second correspondence and information of the first signal; wherein the second correspondence is the correspondence between the value range of the received power of the first signal and the value of the compensation coefficient; or, the second correspondence is the correspondence between the index corresponding to the first signal and the value of the compensation coefficient; or, the second correspondence is the correspondence between the value range of the received power of the first signal, the index corresponding to the first signal and the value of the compensation coefficient.

[0239] Optionally, the second corresponding relationship comes from the first access network device, and the second corresponding relationship is carried on at least one of the following messages: a system message, a synchronization signal, or an RRC message; or, the second corresponding relationship is predefined by the protocol.

[0240] In one possible design scheme, the first access network device and the second access network device are the same device, and the transceiver module 1002 is specifically used to receive the secondary synchronization signal SSS sent by the first access network device; the processing module 1001 is specifically used to determine the compensation coefficient based on the signal receiving power of the SSS.

[0241] In one possible design scheme, the first access network device and the second access network device are the same device, and the value of the compensation coefficient is inversely correlated with the value of the received power of the first signal.

[0242] In one possible design scheme, the cell of the first access network device and the cell of the second access network device are adjacent cells, or the first access network device is a macro base station and the second access network device is a micro base station under the macro base station. The transceiver module 1002 is specifically used to receive the SSS of the first access network device; the processing module 1001 is specifically used to determine the compensation coefficient based on the signal receiving power of the SSS and the index corresponding to the SSS, or the index corresponding to the SSS.

[0243] In one possible design, the transmission power of the second signal is less than or equal to the maximum transmission power of the terminal device.

[0244] Optionally, the transceiver module 1002 may include a sending module (not shown in FIG10 ) and a receiving module (not shown in FIG10 ). The sending module is used to implement the sending function of the communication device 1000 , and the receiving module is used to implement the receiving function of the communication device 1000 .

[0245] Optionally, the communication device 1000 may further include a storage module (not shown in FIG10 ) storing a program or instruction. When the processing module 1001 executes the program or instruction, the communication device 1000 may perform the functions of the terminal device in the method shown in FIG4 in the above method.

[0246] It can be understood that the communication device 1000 can be a terminal, such as a remote UE or remote device, or a chip (system) or other parts or components that can be set in the terminal, or a device including a terminal. This application does not limit this.

[0247] In addition, the technical effects of the communication device 1000 can refer to the technical effects of the communication method shown in Figure 4, and will not be repeated here.

[0248] In some other embodiments, the communication apparatus 1000 may be applicable to the communication system shown in FIG. 2 , and perform the function of the first access network device in the method shown in FIG. 4 .

[0249] Among them, the processing module 1001 is used to obtain a second corresponding relationship, and the second corresponding relationship is used to indicate the corresponding relationship between the value range of the received power of the first signal and the value of the compensation coefficient; or, the second corresponding relationship is used to indicate the corresponding relationship between the index corresponding to the first signal and the value of the compensation coefficient; or, the second corresponding relationship is used to indicate the corresponding relationship between the value range of the received power of the first signal, the index corresponding to the first signal and the value of the compensation coefficient; the transceiver module 1002 is used to send the second corresponding relationship.

[0250] In a possible design scheme, the transceiver module 1002 is further configured to send a first correspondence relationship, where the first correspondence relationship is used to indicate a correspondence relationship between the service information and the value of the first power offset.

[0251] Optionally, the transceiver module 1002 may include a sending module (not shown in FIG10 ) and a receiving module (not shown in FIG10 ). The sending module is used to implement the sending function of the communication device 1000 , and the receiving module is used to implement the receiving function of the communication device 1000 .

[0252] Optionally, the communication device 1000 may further include a storage module (not shown in FIG10 ) storing a program or instruction. When the processing module 1001 executes the program or instruction, the communication device 1000 may perform the function of the first access network device in the method shown in FIG4 in the above method.

[0253] It can be understood that the communication device 1000 can be a network device, a chip (system) or other parts or components that can be set in the network device, or a device that includes a network device. This application does not limit this.

[0254] In addition, the technical effects of the communication device 1000 can refer to the technical effects of the communication method shown in Figure 4, and will not be repeated here.

[0255] Figure 11 is a second structural diagram of a communication device provided in an embodiment of the present application. Exemplarily, the communication device may be a terminal, or a chip (system) or other component or assembly that can be provided in a terminal. As shown in Figure 11, the communication device 1100 may include a processor 1101. Optionally, the communication device 1100 may further include a memory 1102 and / or a transceiver 1103. The processor 1101 is coupled to the memory 1102 and the transceiver 1103, such as by a communication bus.

[0256] The following is a detailed introduction to the various components of the communication device 1100 with reference to FIG11 :

[0257] The processor 1101 is the control center of the communication device 1100 and can be a single processor or a collective term for multiple processing elements. For example, the processor 1101 can be one or more central processing units (CPUs), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more digital signal processors (DSPs) or one or more field programmable gate arrays (FPGAs).

[0258] Optionally, the processor 1101 may execute various functions of the communication device 1100 , such as executing the communication method shown in FIG. 4 , by running or executing a software program stored in the memory 1102 and calling data stored in the memory 1102 .

[0259] In a specific implementation, as an embodiment, the processor 1101 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG11 .

[0260] In a specific implementation, as an embodiment, the communication device 1100 may also include multiple processors, such as the processor 1101 and the processor 1104 shown in FIG11 . Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0261] Among them, the memory 1102 is used to store the software program for executing the solution of this application, and the execution is controlled by the processor 1101. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0262] Alternatively, the memory 1102 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1102 may be integrated with the processor 1101 or exist independently and be coupled to the processor 1101 via an interface circuit (not shown in FIG. 11 ) of the communication device 1100, which is not specifically limited in this embodiment of the present application.

[0263] Transceiver 1103 is used for communication with other communication devices. For example, if communication device 1100 is a terminal, transceiver 1103 can be used to communicate with a network device or another terminal device. For another example, if communication device 1100 is a network device, transceiver 1103 can be used to communicate with a terminal or another network device.

[0264] Optionally, the transceiver 1103 may include a receiver and a transmitter (not shown separately in FIG11 ), wherein the receiver is used to implement a receiving function, and the transmitter is used to implement a transmitting function.

[0265] Optionally, the transceiver 1103 may be integrated with the processor 1101 or exist independently and be coupled to the processor 1101 through an interface circuit (not shown in FIG. 11 ) of the communication device 1100 . This embodiment of the present application does not specifically limit this.

[0266] It is understandable that the structure of the communication device 1100 shown in FIG11 does not constitute a limitation on the communication device, and an actual communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0267] In addition, the technical effects of the communication device 1100 can refer to the technical effects of the methods described in the above method embodiments, and will not be repeated here.

[0268] It should be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), and the processor may 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 may be a microprocessor or any conventional processor, etc.

[0269] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0270] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (such as infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0271] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. A and B can be singular or plural. Furthermore, the character " / " as used herein generally indicates an "or" relationship between the associated objects, but it may also indicate an "and / or" relationship. For specific understanding, please refer to the context.

[0272] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0273] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0274] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0275] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0276] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0277] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0278] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0279] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling 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 method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0280] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: The method comprises: Obtaining a compensation coefficient; the compensation coefficient is determined according to information of a first signal sent by a first access network device, where the information of the first signal includes at least one of the following: a received power of the first signal, or an index corresponding to the first signal; According to the compensation coefficient, a second signal is sent to the second access network device; the transmission power of the second signal is determined according to the compensation coefficient.

2. The method according to claim 1, characterized in that The transmission power of the second signal is determined according to the maximum transmission power of the terminal device and the compensation coefficient.

3. The method according to claim 2, characterized in that The transmit power of the second signal is determined according to the maximum transmit power of the terminal device, the compensation coefficient and the power increase step size; or, the transmit power of the second signal is determined according to the maximum transmit power of the terminal device, the compensation coefficient and the first power offset; or, the transmit power of the second signal is determined according to the maximum transmit power of the terminal device, the compensation coefficient, the power increase step size and the first power offset; The power increase step is the power increased when the second signal is retransmitted, and the first power offset is determined according to the service information of the terminal device.

4. The method according to claim 3, characterized in that The transmission power of the second signal is expressed as: P = min {P CMAX ,α1·P CMAX +Δ1+Δ2}; Wherein, P is the transmission power of the second signal, P CMAX is the maximum transmit power of the terminal device, α1 is the compensation coefficient, Δ1 is the power increase step, Δ2 is the first power offset, min{P CMAX ,α1·P CMAX +Δ1+Δ2} means from P CMAX and α1·P CMAX Select the smallest value among +Δ1+Δ2.

5. The method according to claim 1, characterized in that The transmission power of the second signal is determined according to the signal reception power expected by the second access network device, the path loss between the terminal device and the first access network device, and the compensation coefficient.

6. The method according to claim 5, characterized in that The transmission power of the second signal is determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient and the power increase step; or, the transmission power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient and the first power offset; or, the transmission power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient and the first adjustment amount; or, the transmission power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient, The power increase step size and the first power offset are determined; or, the transmit power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient, the power increase step size and the first adjustment amount; or, the transmit power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient, the first power offset amount and the first adjustment amount; or, the transmit power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient, the power increase step size, the first power offset amount and the first adjustment amount; Among them, the power increase step is the power increased when the second signal is retransmitted, the first power offset is determined according to the service information of the terminal device, and the first adjustment amount is the power adjustment amount related to the frequency domain resource allocation and link adaptation corresponding to the second signal.

7. The method according to claim 6, characterized in that The transmission power of the second signal is expressed as: P = min {P CMAX ,P e +α2·PL+Δ1}; Wherein, P is the transmission power of the second signal, P CMAX is the maximum transmission power of the terminal device, P e is the signal receiving power expected by the second access network device, α2 is the compensation coefficient, PL is the path loss, Δ1 is the power increase step size, min{P CMAX ,P e +α2·PL+Δ1} represents the CMAX and P e Select the smallest value among +α2·PL+Δ1.

8. The method according to claim 6, characterized in that The transmission power of the second signal is expressed as: P = min {P CMAX ,P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB )}; Wherein, P is the transmission power of the second signal, P CMAX is the maximum transmission power of the terminal device, P e is the signal receiving power expected by the second access network device, α2 is the compensation coefficient, PL is the path loss, Δ1 is the power increase step size, Δ2 is the first power bias, 10log 10 (2 μ ·M RB ) is the first adjustment amount, μ corresponds to the subcarrier spacing used to transmit the second signal, M RB The number of resource blocks RB occupied by transmitting the second signal, min{P CMAX ,P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB )} means from P CMAX and P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB ) selects the smallest value.

9. The method according to any one of claims 3 to 8, characterized in that: The first power offset is determined according to a first corresponding relationship between the service information of the terminal device and a value of the first power offset.

10. The method according to claim 9, characterized in that The first corresponding relationship comes from the first access network device, and the first corresponding relationship is carried on at least one of the following messages: a system message, a synchronization signal, or a radio resource control RRC message; or, The first corresponding relationship is predefined by the protocol.

11. The method according to any one of claims 1 to 10, characterized in that The obtaining of the compensation coefficient comprises: Determine the compensation coefficient based on a second corresponding relationship and information of the first signal; wherein the second corresponding relationship is a corresponding relationship between a value range of the received power of the first signal and a value of the compensation coefficient; or, the second corresponding relationship is a corresponding relationship between an index corresponding to the first signal and a value of the compensation coefficient; or, the second corresponding relationship is a corresponding relationship between a value range of the received power of the first signal, an index corresponding to the first signal and a value of the compensation coefficient.

12. The method according to claim 11, characterized in that The second corresponding relationship comes from the first access network device, and the second corresponding relationship is carried on at least one of the following messages: a system message, a synchronization signal, or an RRC message; or, The second corresponding relationship is predefined by the protocol.

13. The method according to any one of claims 1 to 12, characterized in that The first access network device and the second access network device are the same device, and obtaining the compensation coefficient includes: Receiving a secondary synchronization signal SSS sent by the first access network device; The compensation coefficient is determined according to the signal receiving power of the SSS.

14. The method according to any one of claims 1 to 13, characterized in that The first access network device and the second access network device are the same device, and the value of the compensation coefficient is inversely correlated with the value of the receiving power of the first signal.

15. The method according to any one of claims 1 to 12, characterized in that The cell of the first access network device and the cell of the second access network device are neighboring cells, or the first access network device is a macro base station and the second access network device is a micro base station under the macro base station, and obtaining the compensation coefficient includes: Receiving the SSS of the first access network device; The compensation coefficient is determined according to the signal receiving power of the SSS and the index corresponding to the SSS, or the index corresponding to the SSS.

16. The method according to any one of claims 1 to 15, characterized in that The transmission power of the second signal is less than or equal to the maximum transmission power of the terminal device.

17. A communication method, characterized in that: The method comprises: Obtain a second correspondence relationship, where the second correspondence relationship is used to indicate a correspondence between a value range of the received power of the first signal and a value of the compensation coefficient; or, the second correspondence relationship is used to indicate a correspondence between an index corresponding to the first signal and a value of the compensation coefficient; or, the second correspondence relationship is used to indicate a correspondence between a value range of the received power of the first signal, an index corresponding to the first signal, and a value of the compensation coefficient; The second corresponding relationship is sent.

18. The method according to claim 17, characterized in that The method further comprises: A first corresponding relationship is sent, where the first corresponding relationship is used to indicate a corresponding relationship between service information of the terminal device and a value of the first power offset.

19. A communication device, characterized in that: The device comprises: A processing module, configured to obtain a compensation coefficient; the compensation coefficient is determined according to information of a first signal sent by a first access network device, wherein the information of the first signal includes at least one of the following: a received power of the first signal, or an index corresponding to the first signal; The transceiver module is used to send a second signal to the second access network device according to the compensation coefficient; the transmission power of the second signal is determined according to the compensation coefficient.

20. The device according to claim 19, characterized in that The transmission power of the second signal is determined according to the maximum transmission power of the terminal device and the compensation coefficient.

21. The device according to claim 20, characterized in that The transmit power of the second signal is determined according to the maximum transmit power of the terminal device, the compensation coefficient and the power increase step size; or, the transmit power of the second signal is determined according to the maximum transmit power of the terminal device, the compensation coefficient and the first power offset; or, the transmit power of the second signal is determined according to the maximum transmit power of the terminal device, the compensation coefficient, the power increase step size and the first power offset; The power increase step is the power increased when the second signal is retransmitted, and the first power offset is determined according to the service information of the terminal device.

22. The device according to claim 21, characterized in that The transmission power of the second signal is expressed as: P = min {P CMAX ,α1·P CMAX +Δ1+Δ2}; Wherein, P is the transmission power of the second signal, P CMAX is the maximum transmit power of the terminal device, α1 is the compensation coefficient, Δ1 is the power increase step, Δ2 is the first power offset, min{P CMAX ,α1·P CMAX +Δ1+Δ2} means from P CMAX and α1·P CMAX Select the smallest value among +Δ1+Δ2.

23. The device according to claim 19, characterized in that The transmission power of the second signal is determined according to the signal reception power expected by the second access network device, the path loss between the terminal device and the first access network device, and the compensation coefficient.

24. The device according to claim 23, characterized in that The transmission power of the second signal is determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient and the power increase step; or, the transmission power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient and the first power offset; or, the transmission power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient and the first adjustment amount; or, the transmission power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient, The power increase step size and the first power offset are determined; or, the transmit power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient, the power increase step size and the first adjustment amount; or, the transmit power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient, the first power offset amount and the first adjustment amount; or, the transmit power of the second signal is specifically determined according to the signal reception power expected by the second access network device, the path loss, the compensation coefficient, the power increase step size, the first power offset amount and the first adjustment amount; Among them, the power increase step is the power increased when the second signal is retransmitted, the first power offset is determined according to the service information of the terminal device, and the first adjustment amount is the power adjustment amount related to the frequency domain resource allocation and link adaptation corresponding to the second signal.

25. The device according to claim 24, characterized in that The transmission power of the second signal is expressed as: P = min {P CMAX ,P e +α2·PL+Δ1}; Wherein, P is the transmission power of the second signal, P CMAX is the maximum transmission power of the terminal device, P e is the signal receiving power expected by the second access network device, α2 is the compensation coefficient, PL is the path loss, Δ1 is the power increase step size, min{P CMAX ,P e +α2·PL+Δ1} represents the CMAX and P e Select the smallest value among +α2·PL+Δ1.

26. The device according to claim 24, characterized in that The transmission power of the second signal is expressed as: P = min {P CMAX ,P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB )}; Wherein, P is the transmission power of the second signal, P CMAX is the maximum transmission power of the terminal device, P e is the signal receiving power expected by the second access network device, α2 is the compensation coefficient, PL is the path loss, Δ1 is the power increase step, Δ2 is the first power offset, 10log 10 (2 μ ·M RB ) is the first adjustment amount, μ corresponds to the subcarrier spacing used to transmit the second signal, M RB The number of resource blocks RB occupied by transmitting the second signal, min{P CMAX ,P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB )} means from P CMAX and P e +α2·PL+Δ1+Δ2+10log 10 (2 μ ·M RB ) selects the smallest value.

27. The device according to any one of claims 21 to 26, characterized in that The first power offset is determined according to a first corresponding relationship between the service information of the terminal device and a value of the first power offset.

28. The device according to claim 27, characterized in that The first corresponding relationship comes from the first access network device, and the first corresponding relationship is carried on at least one of the following messages: a system message, a synchronization signal, or a radio resource control RRC message; or, The first corresponding relationship is predefined by the protocol.

29. The device according to any one of claims 19 to 28, characterized in that The processing module is specifically used to determine the compensation coefficient based on a second corresponding relationship and information of the first signal; wherein the second corresponding relationship is the corresponding relationship between the value range of the receiving power of the first signal and the value of the compensation coefficient; or, the second corresponding relationship is the corresponding relationship between the index corresponding to the first signal and the value of the compensation coefficient; or, the second corresponding relationship is the corresponding relationship between the value range of the receiving power of the first signal, the index corresponding to the first signal and the value of the compensation coefficient.

30. The device according to claim 29, characterized in that The second corresponding relationship comes from the first access network device, and the second corresponding relationship is carried on at least one of the following messages: a system message, a synchronization signal, or an RRC message; or, The second corresponding relationship is predefined by the protocol.

31. The device according to any one of claims 19 to 30, characterized in that The first access network device and the second access network device are the same device, and the transceiver module is specifically used to receive the secondary synchronization signal SSS sent by the first access network device; the processing module is specifically used to determine the compensation coefficient according to the signal receiving power of the SSS.

32. The device according to any one of claims 19 to 31, characterized in that The first access network device and the second access network device are the same device, and the value of the compensation coefficient is inversely correlated with the value of the receiving power of the first signal.

33. The device according to any one of claims 19 to 30, characterized in that The cell of the first access network device and the cell of the second access network device are neighboring cells, or the first access network device is a macro base station and the second access network device is a micro base station under the macro base station, and the transceiver module is specifically used to receive the SSS of the first access network device; the processing module is specifically used to determine the compensation coefficient according to the signal receiving power of the SSS and the index corresponding to the SSS, or the index corresponding to the SSS.

34. The device according to any one of claims 19 to 33, characterized in that The transmission power of the second signal is less than or equal to the maximum transmission power of the terminal device.

35. A communication device, characterized in that: The device comprises: A processing module, used to obtain a second corresponding relationship, where the second corresponding relationship is used to indicate a corresponding relationship between a value range of the received power of the first signal and a value of the compensation coefficient; or, the second corresponding relationship is used to indicate a corresponding relationship between an index corresponding to the first signal and a value of the compensation coefficient; or, the second corresponding relationship is used to indicate a corresponding relationship between a value range of the received power of the first signal, an index corresponding to the first signal, and a value of the compensation coefficient; The transceiver module is used to send the second corresponding relationship.

36. The device according to claim 35, characterized in that The transceiver module is further used to send a first corresponding relationship, where the first corresponding relationship is used to indicate a corresponding relationship between the service information of the terminal device and the value of the first power offset.

37. A communication device, characterized in that: The communication device comprises: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method according to any one of claims 1 to 16, or executes the method according to claim 17 or 18.

38. A communication chip, characterized in that: Instructions are stored therein, and when the chip runs on a communication device, the method according to any one of claims 1 to 16, or the method according to claim 17 or 18 is implemented.

39. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a computer program or instructions. When the computer program or instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 16, or execute the method according to claim 17 or 18.

40. A computer program product, characterized in that The computer program product comprises a computer program or instructions, and when the computer program or instructions are executed by a communication device, the method according to any one of claims 1 to 16, or the method according to claim 17 or 18 is executed.

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