A point-to-point terminal communication method and apparatus

Abstract

The application provides a point-to-point terminal communication method and device, and relates to the technical field of communication. The method comprises the following steps: receiving a first wireless communication signal sent by a second terminal through a pre-established point-to-point communication link; determining a first target gear from a plurality of preset radio frequency transmission gears according to a RSRP measurement value of the first wireless communication signal, wherein each radio frequency transmission gear corresponds to a radio frequency transmission power; sending a second wireless communication signal to the second terminal through the point-to-point communication link, wherein the second wireless communication signal comprises information of the first target gear, so that the second terminal sends a wireless communication signal through the transmission power of the first target gear. Therefore, when the signal is saturated, the signal is sent through a smaller transmission power, the power consumption is reduced, and the situation that the link is disconnected due to signal saturation is avoided; when the signal is weak, the signal is sent through a larger transmission power, and the signal quality is improved.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and more specifically, to a point-to-point terminal communication method and apparatus. Background Technology

[0002] In 5G IoT communication, in addition to the public network base station transmitting communication signals at a constant power, there are also cases of point-to-point communication between devices.

[0003] In point-to-point communication, devices may be within a few meters or even a meter of each other, extremely close proximity. In such close proximity situations, signal saturation can occur. If communication continues at the original power level under saturated signal conditions, it may lead to link disconnection and wasted power. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a point-to-point terminal communication method and apparatus to solve the problems that may lead to link disconnection and power waste if communication continues at the original power under signal saturation conditions.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] In a first aspect, embodiments of this application provide a point-to-point terminal communication method, applied to a first terminal, the method comprising:

[0007] Receive the first wireless communication signal sent by the second terminal using a pre-established point-to-point communication link;

[0008] Based on the RSRP measurement value of the first wireless communication signal, a first target level is determined from a plurality of preset radio frequency transmission levels, wherein each radio frequency transmission level corresponds to a radio frequency transmission power.

[0009] Using the point-to-point communication link, a second wireless communication signal is sent to the second terminal. The second wireless communication signal includes information about the first target gear, so that the second terminal sends the wireless communication signal using the transmission power of the first target gear.

[0010] Optionally, if the first terminal is in base station mode and the second terminal is in user equipment mode, then before receiving the first wireless communication signal transmitted by the second terminal using a pre-established point-to-point wireless communication link, the method further includes:

[0011] The system transmits a synchronization signal and first MIB information to the second terminal using a first preset transmission power level, wherein the first MIB information includes: information of the first preset power level;

[0012] After transmitting the synchronization signal and the first MIB information using the first preset transmission power, if a random access request is received from the second terminal, the point-to-point wireless communication link between the second terminal and the first terminal is established using the first preset power.

[0013] Optionally, before receiving the first wireless communication signal transmitted by the second terminal using a pre-established point-to-point wireless communication link, the method further includes:

[0014] If no random access request from the second terminal is received within a preset time period after transmitting the synchronization signal and the first MIB information using the first preset transmission power, the synchronization signal and the second MIB information are retransmitted to the second terminal using the second preset transmission power, wherein the second MIB information includes: information of the second preset transmission power.

[0015] After transmitting the synchronization signal and the second MIB information using the second preset transmission power, if a random access request is received from the second terminal, the point-to-point wireless communication link between the second terminal and the first terminal is established using the second preset transmission power, wherein the transmission power of the first preset transmission power is higher than that of the second preset transmission power.

[0016] Optionally, determining the first target level from a preset plurality of radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal includes:

[0017] The RSRP measurement value is compared with the RSRP reference range corresponding to the plurality of RF transmit positions;

[0018] From the plurality of radio frequency transmission levels, the radio frequency transmission level corresponding to the target RSRP reference range in which the RSRP measurement value is located is determined as the target level.

[0019] Optionally, determining the first target level from a preset plurality of radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal includes:

[0020] The target transmission level is determined from the plurality of radio frequency transmission levels based on the tracking area (TA) value of the first wireless communication signal and the RSRP measurement value.

[0021] Optionally, determining the target transmission level from the plurality of radio frequency transmission levels based on the TA value of the first wireless communication signal and the RSRP measurement value includes:

[0022] If the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio, then the target level is determined from the plurality of radio frequency transmission levels based on the TA value and the RSRP measurement value.

[0023] Optionally, the method further includes:

[0024] If the measured SNR value is less than or equal to the preset signal-to-noise ratio, then the highest transmission level among the plurality of RF transmission levels is determined as the second target level;

[0025] Using the point-to-point communication link, a third wireless communication signal is sent to the second terminal. The third wireless communication signal includes information about the second target gear, so that the second terminal sends the wireless communication signal using the transmission power of the second target gear.

[0026] Optionally, before comparing the RSRP measurement value with the RSRP reference range corresponding to the plurality of RF transmit positions, the method further includes:

[0027] The adjustment range is calculated based on the preset transmission power difference between two adjacent RF transmission levels and the preset protection interval value.

[0028] Based on the adjustment range, the upper and lower limits of the RSRP reference range corresponding to each radio frequency transmission level are adjusted respectively.

[0029] Optionally, before determining the target transmission level from the plurality of RF transmission levels based on the TA value and the RSRP value if the SNR measurement value of the first wireless communication signal is greater than a preset signal-to-noise ratio, the method further includes:

[0030] Based on the RSRP measurement values ​​of historical wireless communication signals, the RSRP measurement values ​​are smoothed and filtered to obtain updated RSRP measurement values.

[0031] Based on the TA value of the historical wireless communication signal, the TA value is smoothed and filtered to obtain the updated TA value;

[0032] Based on the SNR values ​​of the historical wireless communication signals, the SNR measurement values ​​are smoothed and filtered to obtain updated SNR measurement values.

[0033] If the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio, then determining the target level from the plurality of RF transmission levels based on the TA value and the RSRP measurement value includes:

[0034] If the updated SNR measurement value is greater than the preset signal-to-noise ratio, then the target level is determined from the plurality of RF transmission levels based on the updated TA value and the updated RSRP measurement value.

[0035] Secondly, embodiments of this application provide a point-to-point terminal communication device applied to a first terminal, the device comprising:

[0036] The receiving module is used to receive the first wireless communication signal sent by the second terminal using a pre-established point-to-point communication link;

[0037] The determining module is used to determine a first target level from a plurality of preset radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal, wherein each radio frequency transmission level corresponds to a radio frequency transmission power.

[0038] The transmitting module uses the point-to-point communication link to send a second wireless communication signal to the second terminal. The second wireless communication signal includes information about the first target gear, so that the second terminal sends the wireless communication signal using the transmission power of the first target gear.

[0039] Compared with the prior art, this application has the following beneficial effects:

[0040] This application provides a point-to-point terminal communication method and apparatus. The method involves receiving a first wireless communication signal transmitted by a second terminal using a pre-established point-to-point communication link; determining a first target transmission level from a set of preset radio frequency (RF) transmission levels based on the RSRP measurement value of the first wireless communication signal, wherein each RF transmission level corresponds to a radio frequency transmission power; and transmitting a second wireless communication signal to the second terminal using the point-to-point communication link. The second wireless communication signal includes information about the first target transmission level, enabling the second terminal to transmit the wireless communication signal using the transmission power of the first target level. Therefore, when the signal is saturated, a lower transmission power is used to transmit the signal, reducing power consumption and avoiding link disconnection due to signal saturation; while when the signal is weak, a higher transmission power is used to transmit the signal, improving signal quality. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of a point-to-point terminal communication system;

[0043] Figure 2 A flowchart illustrating a point-to-point terminal communication method provided in an embodiment of this application;

[0044] Figure 3 A flowchart illustrating a point-to-point communication connection establishment method provided in an embodiment of this application;

[0045] Figure 4 A flowchart illustrating another point-to-point communication connection establishment method provided in an embodiment of this application;

[0046] Figure 5 A flowchart illustrating a method for determining a target gear level provided in an embodiment of this application;

[0047] Figure 6 A flowchart illustrating another point-to-point terminal communication method provided in an embodiment of this application;

[0048] Figure 7 A flowchart illustrating yet another point-to-point terminal communication method provided in an embodiment of this application;

[0049] Figure 8 A flowchart illustrating a method for adjusting the RSRP reference range provided in an embodiment of this application;

[0050] Figure 9 A flowchart illustrating a method for smoothing and filtering measured values, provided in an embodiment of this application;

[0051] Figure 10 A schematic diagram of a point-to-point terminal communication device provided in an embodiment of this application;

[0052] Figure 11 This is a schematic diagram of a terminal device provided in an embodiment of this application.

[0053] Icons: 100-First terminal, 200-Second terminal, 1001-Receiver module, 1002-Determiner module, 1003-Transmitter module, 1101-Processor, 1102-Transmitter, 1103-Receiver. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0056] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0057] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0058] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0059] In point-to-point communication, point-to-point devices may be within a few meters or even less than one meter of each other. In such close proximity situations, signal saturation can occur. Continuing to communicate at the original power level under saturated signal conditions results in wasted power. To make point-to-point communication more flexible and energy-efficient, this application provides a point-to-point terminal communication method and apparatus.

[0060] Before introducing the point-to-point terminal communication method, let's first explain the point-to-point terminal communication system. Figure 1 This is a schematic diagram of a point-to-point terminal communication system. (Example) Figure 1 As shown, the system includes: a first terminal 100 and a second terminal 200, which are communicatively connected.

[0061] Each terminal can be divided into two states: BS (Base Station) state and UE (User Equipment) state. Each terminal is in UE state by default upon power-on. When the system needs to establish point-to-point communication, one terminal needs to switch to BS state, similar to the base station state in a live network, to establish a link with another terminal. After successful link establishment, the first terminal 100 and the second terminal 200 can communicate point-to-point through the established link.

[0062] The following specific examples illustrate a point-to-point terminal communication method provided in this application. Figure 2 This is a flowchart illustrating a point-to-point terminal communication method provided in an embodiment of this application. The execution subject of this method is a first terminal, which can be a device with computing processing capabilities. Figure 2As shown, the method includes:

[0063] S101, Receive the first wireless communication signal sent by the second terminal using a pre-established point-to-point communication link.

[0064] In point-to-point terminal communication, after the link is successfully established, the second terminal uses the pre-established point-to-point communication link to send a first wireless communication signal for normal point-to-point communication. The first terminal receives the first wireless communication signal sent by the second terminal.

[0065] S102. Based on the RSRP measurement value of the first wireless communication signal, determine the first target level from a plurality of preset radio frequency transmission levels.

[0066] After the first terminal receives the first wireless communication signal sent by the second terminal, it can measure the first wireless communication signal to obtain the RSRP measurement value corresponding to the currently received first wireless communication signal. The RSRP measurement value is a key parameter characterizing the signal strength of the currently received first wireless communication signal. The larger the RSRP measurement value, the stronger the signal strength of the first wireless communication signal; the smaller the RSRP measurement value, the weaker the signal strength of the first wireless communication signal.

[0067] For example, in the preset multiple RF transmission levels, each RF transmission level corresponds to a RF transmission power. A larger RSRP measurement value indicates a stronger wireless communication signal strength, meaning the distance between the first and second terminals is closer. Maintaining the original power transmission signal in this case would cause signal saturation and increased power consumption. Therefore, a lower power transmission signal is suitable, which avoids signal saturation and reduces power consumption while ensuring point-to-point communication quality. Conversely, a smaller RSRP measurement value indicates a weaker wireless communication signal strength, meaning the distance between the first and second terminals is farther. Maintaining the original power transmission signal in this case would result in poor signal quality. Therefore, a higher power transmission signal is suitable to ensure point-to-point communication quality. In summary, a larger RSRP measurement value for the first wireless communication signal results in a smaller RF transmission power corresponding to the first target level determined by the RSRP measurement value; conversely, a smaller RSRP measurement value for the first wireless communication signal results in a larger RF transmission power corresponding to the first target level determined by the RSRP measurement value.

[0068] S103. Using a point-to-point communication link, a second wireless communication signal is sent to the second terminal, so that the second terminal sends the wireless communication signal using the transmission power of the first target level.

[0069] After the first terminal determines the first target level corresponding to the current first wireless communication signal, in order for the second terminal to transmit wireless communication signals using the transmission power of the first target level, the second terminal needs to be aware of the first target level. Therefore, the first terminal uses a point-to-point communication link to send a second wireless communication signal to the second terminal. The second wireless communication signal includes information about the first target level. After receiving the second wireless communication signal, the second terminal obtains the information about the first target level from the second wireless communication signal, determines the transmission power of the first target level based on the first target level, and transmits a new round of wireless communication signals using the transmission power of the first target level. This allows the transmission power of the second terminal to be adjusted according to the level information fed back by the first terminal, that is, adjusted according to the signal strength fed back by the first terminal. When the signal is saturated, a lower transmission power is used to transmit the signal, reducing power consumption and avoiding link disconnection due to signal saturation. When the signal is weak, a higher transmission power is used to transmit the signal, improving signal quality.

[0070] In summary, in this embodiment, a first wireless communication signal is received from a second terminal via a pre-established point-to-point communication link; based on the RSRP measurement value of the first wireless communication signal, a first target level is determined from a set of preset RF transmission levels, where each RF transmission level corresponds to a RF transmission power; a second wireless communication signal is transmitted to the second terminal via the point-to-point communication link, the second wireless communication signal including information about the first target level, so that the second terminal transmits the wireless communication signal using the transmission power of the first target level. Therefore, when the signal is saturated, a lower transmission power is used to transmit the signal, reducing power consumption and avoiding link disconnection due to signal saturation; when the signal is weak, a higher transmission power is used to transmit the signal, improving signal quality.

[0071] Figure 3 This is a flowchart illustrating a point-to-point communication connection establishment method provided in an embodiment of this application. Figure 3 As shown, if the first terminal is in base station (BS) state and the second terminal is in user equipment (UE) state, then before receiving the first wireless communication signal transmitted by the second terminal using the pre-established point-to-point wireless communication link in S101, the process further includes:

[0072] S201. Using the first preset transmission power level, a synchronization signal and the first MIB (Master Information Block) information are sent to the second terminal.

[0073] Before establishing a link, both the first and second terminals are in UE (User Equipment) state by default. To establish a point-to-point communication link, the first terminal switches from UE state to BS (Browser / Server) state, while the second terminal remains in UE state. The first terminal needs to send synchronization information to the second terminal to attempt link establishment. To ensure rapid and successful link establishment, multiple preset transmission power levels are used sequentially to attempt communication with the second terminal. For example, a synchronization signal and first MIB (Multi-Level Instruction) information are sent to the second terminal using the first preset transmission power level. The first MIB information includes information from the first preset power level.

[0074] S202. After transmitting the synchronization signal and the first MIB information using the first preset transmission power, if a random access request is received from the second terminal, a point-to-point wireless communication link is established with the second terminal using the first preset power.

[0075] After transmitting a synchronization signal and first MIB information using a first preset transmission power level, if the second terminal successfully receives the synchronization signal and first MIB information sent by the first terminal, the second terminal identifies the first preset power level information in the first MIB information and sends a random access request to the first terminal using the first preset power level. If the first terminal receives the random access request sent by the second terminal, it establishes a point-to-point wireless communication link with the second terminal using the first preset power level. That is, the first terminal and the second terminal conduct point-to-point communication using the first preset power level. In this way, a point-to-point wireless communication link is successfully established using the preset power level, ensuring the stability of the communication link.

[0076] In summary, in this embodiment, a synchronization signal and first MIB information are sent to the second terminal using a first preset transmission power level. The first MIB information includes information related to the first preset power level. After sending the synchronization signal and first MIB information using the first preset power level, if a random access request is received from the second terminal, a point-to-point wireless communication link is established with the second terminal using the first preset power level. Thus, a point-to-point wireless communication link is successfully established using the preset power level, ensuring the stability of the communication link.

[0077] Figure 4 This is a flowchart illustrating another point-to-point communication connection establishment method provided in an embodiment of this application. Figure 4 As shown, before receiving the first wireless communication signal transmitted by the second terminal using a pre-established point-to-point wireless communication link in S101, the method further includes:

[0078] S301. If no random access request from the second terminal is received within a preset time period after transmitting the synchronization signal and the first MIB information using the first preset transmission power, the synchronization signal and the second MIB information are retransmitted to the second terminal using the second preset transmission power.

[0079] If, within a preset time period after transmitting the synchronization signal and the first MIB information using the first preset transmission power level, no random access request is received from the second terminal, it indicates that the second terminal did not receive the synchronization signal and the first MIB information sent by the first terminal after transmitting the synchronization signal and the first MIB information using the first preset transmission power level. In other words, the point-to-point communication link was not successfully established using the first preset transmission power level.

[0080] Then, a link establishment attempt is made using the second preset transmission power level. The synchronization signal and the second MIB information are then retransmitted to the second terminal using the second preset transmission power level. The second MIB information includes the information for the second preset power level.

[0081] S302. After transmitting the synchronization signal and the second MIB information using the second preset transmission power, if a random access request is received from the second terminal, a point-to-point wireless communication link is established with the second terminal using the second preset power.

[0082] After transmitting a synchronization signal and second MIB information using a second preset transmission power level, if the second terminal successfully receives the synchronization signal and second MIB information sent by the first terminal, the second terminal identifies the second preset power level information in the second MIB information and sends a random access request to the first terminal using the second preset power level. If the first terminal receives the random access request sent by the second terminal, it establishes a point-to-point wireless communication link with the second terminal using the second preset power level. That is, the first terminal and the second terminal conduct point-to-point communication using the second preset power level.

[0083] For example, the transmission power of the first preset level is higher than that of the second preset level. There can also be multiple preset levels; that is, when attempting to establish communication with the second terminal using multiple preset transmission power levels, the transmission power is used sequentially from high to low. Thus, by using the preset transmission power levels to attempt communication sequentially (if one attempt fails, the cycle continues until successful), a point-to-point wireless communication link is successfully established, ensuring the stability of the communication link.

[0084] In summary, in this embodiment, if no random access request from the second terminal is received within a preset time period after transmitting the synchronization signal and the first MIB information using the first preset transmission power, the synchronization signal and the second MIB information are retransmitted to the second terminal using the second preset transmission power. After transmitting the synchronization signal and the second MIB information using the second preset transmission power, if a random access request from the second terminal is received, a point-to-point wireless communication link with the second terminal is established using the second preset power. Thus, by sequentially attempting different transmission power levels, a point-to-point wireless communication link is successfully established, ensuring the stability of the communication link.

[0085] Figure 5 This is a flowchart illustrating a method for determining a target gear level, as provided in an embodiment of this application. Figure 5 As shown, in S102, determining the first target level from a plurality of preset radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal includes:

[0086] S401. Compare the RSRP measurement value with the RSRP reference range corresponding to multiple RF transmit positions.

[0087] Within the measurable range of RSRP, the measurement range of RSRP is divided into multiple RSRP reference ranges using multiple reference points, with each RSRP reference range corresponding to a radio frequency transmission level. For example, n reference values ​​divide the measurement range of RSRP into (n+1) RSRP reference ranges. Except for the maximum and minimum RSRP reference ranges, the remaining (n-1) RSRP reference ranges can be set at equal intervals.

[0088] The RSRP measurement value is compared with the RSRP reference range corresponding to multiple RF transmit positions.

[0089] S402. From multiple RF transmission levels, determine the RF transmission level corresponding to the target RSRP reference range where the RSRP measurement value is located as the target level.

[0090] By comparing the RSRP measurement value with multiple RSRP reference ranges, the RSRP reference range containing the RSRP measurement value is determined as the target RSRP reference range. The RF transmission level corresponding to the target RSRP reference range is then determined as the target level. In this way, the target level is accurately determined.

[0091] In summary, in this embodiment, the RSRP measurement value is compared with the RSRP reference ranges corresponding to multiple RF transmission levels. From the multiple RF transmission levels, the RF transmission level corresponding to the target RSRP reference range where the RSRP measurement value is located is determined as the target level. Thus, by comparing the RSRP measurement value with multiple RSRP reference ranges, the target level is accurately determined.

[0092] Further, in S102, determining the first target level from a plurality of preset radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal includes:

[0093] Based on the TA value and RSRP measurement value of the first wireless communication signal, the target level is determined from multiple radio frequency transmission levels.

[0094] The transfer signal (TA) value of a wireless communication signal represents the physical distance between communication terminals. If the TA value of the first wireless communication signal is very small, such as 0, it means that the distance between the first terminal and the second terminal is already very small. If a larger radio frequency transmission power is used to transmit the signal at this time, it will definitely cause signal saturation.

[0095] For example, taking a TA value of 0 as an example, it indicates that the distance between the first terminal and the second terminal is already very small. If the TA value of the first wireless communication signal is 0, then the highest transmission level corresponding to the maximum transmission power is discarded from the preset multiple RF transmission levels. Based on the RSRP measurement value of the first wireless communication signal, the first target level is determined from the multiple RF transmission levels after removing the highest transmission level.

[0096] If the TA value of the first wireless communication signal is not 0, then the first target level is determined from all the multiple RF transmission levels based on the RSRP measurement value of the first wireless communication signal. This avoids signal saturation leading to communication link disconnection and reduces communication power consumption.

[0097] In summary, in this embodiment, the target transmission level is determined from multiple RF transmission levels based on the TA value and RSRP measurement value of the first wireless communication signal. This avoids signal saturation leading to communication link disconnection and reduces communication power consumption.

[0098] Figure 6 This is a flowchart illustrating another point-to-point terminal communication method provided in an embodiment of this application. Figure 6 As shown, based on the TA value and RSRP measurement value of the first wireless communication signal, a target range is determined from multiple RF transmission ranges, including:

[0099] S501. Compare the SNR measurement value of the first wireless communication signal with the preset signal-to-noise ratio.

[0100] S502. If the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio, then the target level is determined from multiple radio frequency transmission levels based on the TA value and RSRP measurement value.

[0101] The signal-to-noise ratio (SNR) of a wireless communication signal characterizes the quality of the communication link. If the SNR measurement of the first wireless communication signal is within the normal range, it indicates that the communication link is relatively stable; if the SNR measurement of the first wireless communication signal is low, it indicates that the communication link is poor. To clearly define the range of the SNR measurement value, a preset SNR can be set. If the SNR measurement of the first wireless communication signal is greater than the preset SNR, it indicates that the communication link is relatively stable; if the SNR measurement of the first wireless communication signal is less than or equal to the preset SNR, it indicates that the communication link quality is poor.

[0102] If the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio, it indicates that the communication link is relatively stable. Then, based on the TA value and RSRP measurement value, the target level is determined from multiple RF transmission levels. The specific determination method is similar to the method of determining the target level based on the TA value and RSRP measurement value in the above embodiment, and will not be repeated here.

[0103] In summary, in this embodiment, if the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio, the target level is determined from multiple RF transmission levels based on the TA value and RSRP measurement value. Thus, by using the signal-to-noise ratio as a reference factor, the target level is made more accurate.

[0104] Figure 7 This is a flowchart illustrating another point-to-point terminal communication method provided in an embodiment of this application. Figure 7 As shown, the method also includes:

[0105] S503. If the SNR measurement value is less than or equal to the preset signal-to-noise ratio, then the highest transmission level among the multiple RF transmission levels is determined as the second target level.

[0106] If the SNR measurement of the first wireless communication signal is less than or equal to the preset signal-to-noise ratio, it indicates poor communication link quality. Therefore, to ensure the stability of the communication link, the maximum transmit power needs to be used to transmit the signal. The highest transmit power among multiple RF transmit power levels can be directly determined as the second target power level. The TA value and RSRP measurement value are no longer considered when selecting the power level.

[0107] S504. Using a point-to-point communication link, a third wireless communication signal is sent to the second terminal, so that the second terminal sends the wireless communication signal using the transmission power of the second target level.

[0108] After the first terminal determines the second target power level, in order for the second terminal to transmit wireless communication signals using the transmission power of the second target power level, the second terminal needs to be aware of the second target power level. Therefore, the first terminal uses a point-to-point communication link to send a third wireless communication signal to the second terminal. The third wireless communication signal includes information about the second target power level. After receiving the third wireless communication signal, the second terminal obtains the second target power level information from the third wireless communication signal, determines the transmission power of the second target power level based on the second target power level, and transmits a new round of wireless communication signals using the transmission power of the second target power level. This ensures that the transmission power of the second terminal when transmitting signals is adjusted to the maximum transmission power based on the power level information fed back by the first terminal, thereby improving signal quality.

[0109] In summary, in this embodiment, if the measured SNR is less than or equal to a preset signal-to-noise ratio, the highest transmission level among multiple RF transmission levels is determined as the second target level. A point-to-point communication link is used to send a third wireless communication signal to the second terminal. The third wireless communication signal includes information about the second target level, so that the second terminal transmits the wireless communication signal using the transmission power of the second target level. Therefore, by using the signal-to-noise ratio as a reference factor, the target level is made more accurate, and signal quality is improved.

[0110] Figure 8 This is a flowchart illustrating a method for adjusting the RSRP reference range provided in an embodiment of this application. Figure 8 As shown, before comparing the RSRP measurement value and the RSRP reference range corresponding to multiple RF transmit positions in S401, the following steps are also included:

[0111] S601. Calculate the adjustment range based on the preset transmission power difference between two adjacent RF transmission levels and the preset protection interval value.

[0112] When adjusting the RF transmit power based on the RF transmit level corresponding to the RSRP measurement, a ping-pong effect may occur.

[0113] For example, the RSRP measurement range can be divided into two RSRP reference ranges using a single reference point (-30dBm): the first reference range (less than or equal to -30dBm) and the second reference range (greater than -30dBm). Assume the maximum transmit power is 23dBm, corresponding to the first reference range, and the second-level RF transmit power is 10dBm, corresponding to the second reference range, with a power difference of 13dBm. If the first terminal's current RSRP measurement is -29dBm, while the second terminal's current transmit power is 23dBm, the RSRP measurement is greater than -30dBm, falling within the second reference range, triggering a downsampling switch. In the next signal transmission, the second terminal will reduce its transmit power from 23dBm to 10dBm. At this point, the RSRP measurement received by the first terminal will decrease by 13dBm to -42dBm, which is within the first reference range. The transmit power at this point is 10dBm, triggering an upward switching mechanism that increases the transmit power to 23dBm. This cyclical switching creates a ping-pong effect, making stable switching impossible.

[0114] Therefore, an adjustment range can be set to adjust the upper and lower limits of the RSRP reference range, overcoming the potential ping-pong effect. Specifically, the adjustment range must be greater than the preset transmit power difference between two adjacent RF transmit levels to ensure more stable frequency adjustments each time, preventing repeated jumps.

[0115] Set a preset protection interval value. The adjustment range is calculated based on the preset transmit power difference between two adjacent RF transmit levels and the preset protection interval value. For example, if the preset transmit power difference between two adjacent RF transmit levels is 8dBm and the preset protection interval value is 2dBm, then the adjustment range is 10dBm.

[0116] S602. According to the adjustment range, adjust the upper and lower limits of the RSRP reference range corresponding to each radio frequency transmission level.

[0117] Each RSRP reference range has an upper and lower limit, which is a reference value, i.e., the "n reference values" mentioned in the above embodiment. The lower and upper reference values ​​for each reference value can be determined based on the adjustment range. The reference values ​​are the upper and lower limits of the original reference range, and the lower and upper reference values ​​are the upper and lower limits of the adjusted reference range.

[0118] For example, an RSRP reference range is defined as [-60dBm, -30dBm], where -30dBm is the upper limit and -60dBm is the lower limit. When comparing the RSRP value to this range, it is compared to -60dBm and -30dBm. Taking a 10dBm adjustment range as an example, it can be divided into two 5dBm values ​​(this division is just an example and does not limit the specific method). Therefore, the lower cutoff reference value for -30dBm is -25dBm, and the upper cutoff reference value is -35dBm; the lower cutoff reference value for -60dBm is -55dBm, and the upper cutoff reference value is -65dBm. When comparing the RSRP value to this adjusted range, it is compared to -65dBm and -25dBm. When increasing the transmit power level, only the upper cutoff reference value is referenced; similarly, when decreasing, only the lower cutoff reference value is referenced. If the RSRP value was previously within the transmit power range corresponding to the reference range of [-60dBm, -30dBm), and the RSRP value changes to greater than or equal to -25dBm, the transmit power is then increased; if it changes to less than -65dBm, the transmit power is then decreased. In another example, an RSRP reference range could also be (-60dBm, -30dBm). That is, the above RSRP reference range is merely an example and does not limit the form of the reference range. The reference range can be a left-open-right-closed interval, a left-closed-right-open interval, an open interval, or a closed interval, etc. Any scheme that includes an RSRP reference range is within the protection scope of this application.

[0119] Based on the current transmit power, if an upward adjustment is needed, it is compared with the upper cutoff reference value of the lower limit of the reference range; if a downward adjustment is needed, it is compared with the lower cutoff reference value of the upper limit of the reference range. For example, if the original RSRP reference range is [-90dBm, -60dBm), [-60dBm, -30dBm), or [-30dBm, -0dBm), then the original reference points are -60dBm and -30dBm. The adjusted upper cutoff reference values ​​are -55dBm and -25dBm, and the lower cutoff reference values ​​are -65dBm and -35dBm. If the current transmit power is within the original reference range of [-60dBm, -30dBm), then the current transmit power may be adjusted upward, downward, or remain unchanged. In this case, the adjusted upper cutoff reference value is -65dBm, and the adjusted lower cutoff reference value is -25dBm. When the RSRP value changes to the reference range [-95dBm, -65dBm), the transmit power level is increased. When the RSRP value changes to the reference range [-25dBm, 5dBm), the transmit power level is decreased. If the RSRP value remains within [-65dBm, -25dBm), the current transmit power level remains unchanged. If the current transmit power is within the original reference range [-30dBm, 0dBm), the corresponding adjusted upper reference values ​​are -35dBm and -65dBm. When the RSRP value changes to either the reference range [-65dBm, -35dBm) or [-95dBm, -65dBm), the transmit power level is increased and adjusted to the corresponding level. If the RSRP value remains within [-35dBm, 5dBm), the current transmit power level remains unchanged. If the current transmit power is within the original reference range of [-90dBm, -60dBm), the corresponding adjusted down-cut reference value is -25dBm or -55dBm. When the RSRP value changes to either the reference range of [-55dBm, -55dBm) or [-25dBm, 5dBm), the transmit power level is lowered and adjusted to the corresponding level. If the RSRP value remains within [-95dBm, -55dBm), the current transmit power level remains unchanged.

[0120] In summary, in this embodiment, the adjustment range is calculated based on the preset transmit power difference between two adjacent RF transmit positions and the preset protection interval value; according to the adjustment range, the upper and lower limits of the RSRP reference range corresponding to each RF transmit position are adjusted respectively. This makes the adjustment of the transmit frequency more stable each time, eliminating repeated jumps and overcoming the ping-pong effect.

[0121] Figure 9 This is a flowchart illustrating a method for smoothing and filtering measured values, provided in an embodiment of this application. Figure 9As shown, if the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio, before determining the target level from multiple RF transmission levels based on the TA value and RSRP measurement value, the method further includes:

[0122] S701. Based on the RSRP measurement values ​​of historical wireless communication signals, perform smoothing filtering on the RSRP measurement values ​​to obtain updated RSRP measurement values.

[0123] Weight values ​​are assigned to the RSRP measurements of historical wireless communication signals and the current RSRP measurement values ​​to perform smoothing filtering on the RSRP measurements. The specific calculation method is shown in the following formula (1):

[0124]

[0125] Among them, RSRP 更新 The updated RSRP measurement; RSRP 历史 The RSRP measurement value is the historical wireless communication signal value, specifically the RSRP measurement value obtained in the previous update; RSRP 测量 is the current RSRP measurement value; j is the weight value of the RSRP measurement value of historical wireless communication signals; k is the weight value of the current RSRP measurement value. j and k can be preset weight values, which can be determined according to the actual device performance stability and switching response speed.

[0126] S702. Based on the TA value of the historical wireless communication signal, perform smoothing filtering on the TA value to obtain the updated TA value.

[0127] Weights are assigned to the historical TA values ​​and the current TA values ​​to perform smoothing filtering on the TA values. The specific calculation method is shown in formula (2) below:

[0128]

[0129] Among them, TA 更新 The updated TA value; TA 历史 The TA value is the historical wireless communication signal's TA value, specifically the TA value obtained from the previous update; TA 测量 t is the current TA measurement value; j is the weight value of the TA value of historical wireless communication signals; k is the weight value of the current TA measurement value. j and k can be preset weight values, which can be determined according to the actual equipment performance stability and switching response speed.

[0130] S703. Based on the SNR values ​​of historical wireless communication signals, perform smoothing filtering on the SNR measurement value to obtain the updated SNR measurement value.

[0131] Weights are assigned to the SNR values ​​of historical wireless communication signals and the current SNR value to perform smoothing filtering on the SNR value. The specific calculation method is shown in the following formula (2):

[0132]

[0133] Among them, SNR 更新 The updated SNR value; SNR 历史 The SNR value is the historical wireless communication signal's SNR value, specifically the SNR value obtained in the previous update. 测量 is the current SNR measurement value; j is the weight value of the SNR values ​​of historical wireless communication signals; k is the weight value of the current SNR measurement value. j and k can be preset weight values, which can be determined according to the actual device performance stability and switching response speed.

[0134] S704. Compare the updated SNR measurement with the preset signal-to-noise ratio.

[0135] Furthermore, if the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio, then based on the TA value and RSRP measurement value, a target level is determined from multiple RF transmission levels, including:

[0136] S705. If the updated SNR measurement value is greater than the preset signal-to-noise ratio, then the target level is determined from multiple RF transmission levels based on the updated TA value and the updated RSRP measurement value.

[0137] The target gear level is determined based on the updated SNR, TA, and RSRP measurements. The specific determination method and its beneficial effects are similar to those described in the above embodiments, and will not be repeated here.

[0138] In summary, in this embodiment, based on the RSRP measurement value of historical wireless communication signals, a smoothing filter is applied to the RSRP measurement value to obtain an updated RSRP measurement value; based on the TA value of historical wireless communication signals, a smoothing filter is applied to the TA value to obtain an updated TA value; based on the SNR value of historical wireless communication signals, a smoothing filter is applied to the SNR measurement value to obtain an updated SNR measurement value; if the updated SNR measurement value is greater than a preset signal-to-noise ratio, then based on the updated TA value and the updated RSRP measurement value, a target transmission level is determined from multiple RF transmission levels. Thus, various measurement values ​​are smoothed to avoid large fluctuations.

[0139] The following describes a point-to-point terminal communication device, equipment, and storage medium provided in this application for implementation. The specific implementation process and technical effects are described above and will not be repeated below.

[0140] Figure 10 This is a schematic diagram of a point-to-point terminal communication device provided in an embodiment of this application, as shown below. Figure 10 As shown, the device is applied to a first terminal and includes:

[0141] The receiving module 1001 is used to receive the first wireless communication signal sent by the second terminal using a pre-established point-to-point communication link.

[0142] The determining module 1002 is used to determine a first target level from a plurality of preset radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal, wherein each radio frequency transmission level corresponds to a radio frequency transmission power.

[0143] The transmitting module 1003 uses a point-to-point communication link to send a second wireless communication signal to the second terminal. The second wireless communication signal includes information about a first target level, so that the second terminal sends the wireless communication signal using the transmission power of the first target level.

[0144] Furthermore, the receiving module 1001 is also configured to, if the first terminal is in base station state and the second terminal is in user equipment (UE) state, before receiving the first wireless communication signal sent by the second terminal using a pre-established point-to-point wireless communication link, further include: sending a synchronization signal and first MIB information to the second terminal using a first preset level of transmission power, wherein the first MIB information includes: information of the first preset level; after sending the synchronization signal and first MIB information using the first preset level of transmission power, if a random access request sent by the second terminal is received, then a point-to-point wireless communication link between the receiver and the second terminal is established using the first preset level.

[0145] Furthermore, before receiving the first wireless communication signal transmitted by the second terminal using a pre-established point-to-point wireless communication link, the method further includes: if no random access request from the second terminal is received within a preset time period after transmitting the synchronization signal and the first MIB information using a first preset level of transmission power, then retransmitting the synchronization signal and the second MIB information to the second terminal using a second preset level of transmission power, wherein the second MIB information includes: information of the second preset level; and if a random access request sent by the second terminal is received after transmitting the synchronization signal and the second MIB information using a second preset level of transmission power, then establishing a point-to-point wireless communication link with the second terminal using a second preset level of transmission power, wherein the transmission power of the first preset level is higher than the transmission power of the second preset level.

[0146] Further, the determination module 1002 is specifically used to compare the RSRP measurement value with the RSRP reference range corresponding to multiple RF transmission levels; from the multiple RF transmission levels, the RF transmission level corresponding to the target RSRP reference range where the RSRP measurement value is located is determined as the target level.

[0147] Furthermore, the determining module 1002 is also specifically used to determine a first target level from a plurality of preset radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal, including: determining the target level from a plurality of radio frequency transmission levels based on the TA value and RSRP measurement value of the first wireless communication signal.

[0148] Furthermore, the determining module 1002 is also specifically used to determine a target level from multiple radio frequency transmission levels based on the TA value and RSRP measurement value of the first wireless communication signal, including: if the SNR measurement value of the first wireless communication signal is greater than a preset signal-to-noise ratio, then determine the target level from multiple radio frequency transmission levels based on the TA value and RSRP measurement value.

[0149] Furthermore, the determining module 1002 is also specifically used to determine the highest transmission level among multiple radio frequency transmission levels as the second target level if the SNR measurement value is less than or equal to the preset signal-to-noise ratio; and to send a third wireless communication signal to the second terminal using a point-to-point communication link. The third wireless communication signal includes information about the second target level, so that the second terminal can send the wireless communication signal using the transmission power of the second target level.

[0150] Furthermore, the determining module 1002 is also specifically used to, before comparing the RSRP measured value and the RSRP reference range corresponding to multiple radio frequency transmission positions, further include: calculating the adjustment range based on the preset transmit power difference between two adjacent radio frequency transmission positions and the preset protection interval value; and adjusting the upper and lower limits of the RSRP reference range corresponding to each radio frequency transmission position according to the adjustment range.

[0151] Furthermore, the determining module 1002 is also specifically used to determine the target level from multiple radio frequency transmission levels based on the TA value and RSRP value before determining the target level based on the TA value and RSRP value if the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio. The method further includes: performing smoothing filtering on the RSRP measurement value based on the historical wireless communication signal to obtain an updated RSRP measurement value; performing smoothing filtering on the TA value based on the historical wireless communication signal to obtain an updated TA value; performing smoothing filtering on the SNR measurement value based on the historical wireless communication signal to obtain an updated SNR measurement value; if the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio, determining the target level from multiple radio frequency transmission levels based on the TA value and RSRP value includes: if the updated SNR measurement value is greater than the preset signal-to-noise ratio, determining the target level from multiple radio frequency transmission levels based on the updated TA value and the updated RSRP value.

[0152] Figure 11 This is a schematic diagram of a terminal device provided in an embodiment of this application. The terminal device can be a device with processing, sending, and receiving functions. For example... Figure 11 As shown:

[0153] The terminal device includes a processor 1101, a transmitter 1102, and a receiver 1103. The processor 1101 is connected to the transmitter 1102 and the receiver 1103 via a bus.

[0154] Receiver 1103 is used to receive signals sent by other terminal devices and transmit them to processor 1101. Processor 1101 is used to execute the above method embodiments. The specific implementation and technical effects are similar and will not be described again here. Transmitter 1102 is used to send the processing results of processor 1101 to other terminal devices.

[0155] Optionally, the present invention also provides a program product, such as a computer-readable storage medium, including a program that, when executed by a processor, is used to perform the above-described method embodiments.

[0156] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0157] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0158] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0159] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A point-to-point terminal communication method, characterized in that, Applied to a first terminal, the method includes: Receive the first wireless communication signal sent by the second terminal using a pre-established point-to-point communication link; Based on the reference signal received power (RSRP) measurement value of the first wireless communication signal, a first target level is determined from a plurality of preset radio frequency transmission levels, wherein each radio frequency transmission level corresponds to a radio frequency transmission power. Using the point-to-point communication link, a second wireless communication signal is sent to the second terminal. The second wireless communication signal includes information about the first target gear, so that the second terminal sends the wireless communication signal using the transmission power of the first target gear. The step of determining the first target level from a preset plurality of radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal includes: Based on the tracking area (TA) value of the first wireless communication signal and the RSRP measurement value, the first target level is determined from the plurality of radio frequency transmission levels; The step of determining the first target transmission level from the plurality of radio frequency transmission levels based on the tracking area (TA) value of the first wireless communication signal and the RSRP measurement value includes: If the tracking area TA value of the first wireless communication signal is equal to 0, then the first target level is determined from the multiple radio frequency transmission levels other than the highest transmission level, based on the RSRP measurement value of the first wireless communication signal. If the tracking area (TA) value of the first wireless communication signal is greater than 0, then the first target level is determined from the plurality of radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal. Determining the first target transmission level from the plurality of radio frequency transmission levels based on the TA value of the first wireless communication signal and the RSRP measurement value includes: If the signal-to-noise ratio (SNR) measurement value of the first wireless communication signal is greater than the preset SNR, then the first target level is determined from the plurality of radio frequency transmission levels based on the TA value and the RSRP measurement value. If the measured SNR value is less than or equal to the preset signal-to-noise ratio, then the highest transmission level among the plurality of RF transmission levels is determined as the second target level; Using the point-to-point communication link, a third wireless communication signal is sent to the second terminal. The third wireless communication signal includes information about the second target gear, so that the second terminal sends the wireless communication signal using the transmission power of the second target gear.

2. The method according to claim 1, characterized in that, If the first terminal is in base station mode and the second terminal is in user equipment mode, then before receiving the first wireless communication signal transmitted by the second terminal using a pre-established point-to-point wireless communication link, the method further includes: The system transmits a synchronization signal and a first main information block (MIB) information to the second terminal using a first preset transmission power level. The first MIB information includes information about the first preset power level. After transmitting the synchronization signal and the first MIB information using the first preset transmission power, if a random access request is received from the second terminal, the point-to-point wireless communication link between the second terminal and the first terminal is established using the first preset power.

3. The method according to claim 2, characterized in that, Before receiving the first wireless communication signal transmitted by the second terminal using a pre-established point-to-point wireless communication link, the method further includes: If no random access request from the second terminal is received within a preset time period after transmitting the synchronization signal and the first MIB information using the first preset transmission power, the synchronization signal and the second MIB information are retransmitted to the second terminal using the second preset transmission power, wherein the second MIB information includes: information of the second preset transmission power. After transmitting the synchronization signal and the second MIB information using the second preset transmission power, if a random access request is received from the second terminal, the point-to-point wireless communication link between the second terminal and the first terminal is established using the second preset transmission power, wherein the transmission power of the first preset transmission power is higher than that of the second preset transmission power.

4. The method according to claim 1, characterized in that, The step of determining the first target level from a preset plurality of radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal includes: The RSRP measurement value is compared with the RSRP reference range corresponding to the plurality of RF transmit positions; From the plurality of radio frequency transmission levels, the radio frequency transmission level corresponding to the target RSRP reference range where the RSRP measurement value is located is determined as the first target level.

5. The method according to claim 4, characterized in that, Before comparing the RSRP measurement value with the RSRP reference range corresponding to the plurality of RF transmit positions, the method further includes: The adjustment range is calculated based on the preset transmission power difference between two adjacent RF transmission levels and the preset protection interval value. Based on the adjustment range, the upper and lower limits of the RSRP reference range corresponding to each radio frequency transmission level are adjusted respectively.

6. The method according to claim 1, characterized in that, Before determining the first target transmission level from the plurality of RF transmission levels based on the TA value and the RSRP value if the SNR measurement value of the first wireless communication signal is greater than the preset signal-to-noise ratio, the method further includes: Based on the RSRP measurement values ​​of historical wireless communication signals, the RSRP measurement values ​​are smoothed and filtered to obtain updated RSRP measurement values. Based on the TA value of the historical wireless communication signal, the TA value is smoothed and filtered to obtain the updated TA value; Based on the SNR values ​​of the historical wireless communication signals, the SNR measurement values ​​are smoothed and filtered to obtain updated SNR measurement values. If the signal-to-noise ratio (SNR) measurement value of the first wireless communication signal is greater than a preset SNR, then determining the first target level from the plurality of radio frequency transmission levels based on the TA value and the RSRP measurement value includes: If the updated SNR measurement value is greater than the preset signal-to-noise ratio, then the first target level is determined from the plurality of RF transmission levels based on the updated TA value and the updated RSRP measurement value.

7. A point-to-point terminal communication device, characterized in that, Applied to a first terminal, the device includes: The receiving module is used to receive the first wireless communication signal sent by the second terminal using a pre-established point-to-point communication link; The determining module is used to determine a first target level from a plurality of preset radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal, wherein each radio frequency transmission level corresponds to a radio frequency transmission power. The transmitting module uses the point-to-point communication link to send a second wireless communication signal to the second terminal. The second wireless communication signal includes information about the first target gear, so that the second terminal sends the wireless communication signal using the transmission power of the first target gear. The determining module is specifically used to determine the first target level from the plurality of radio frequency transmission levels based on the tracking area (TA) value of the first wireless communication signal and the RSRP measurement value. The determining module is further configured to: if the tracking area TA value of the first wireless communication signal is equal to 0, determine the first target level from a plurality of radio frequency transmission levels other than the highest transmission level based on the RSRP measurement value of the first wireless communication signal; if the tracking area TA value of the first wireless communication signal is greater than 0, determine the first target level from the plurality of radio frequency transmission levels based on the RSRP measurement value of the first wireless communication signal. The determining module is further configured to determine the first target level from the plurality of radio frequency transmission levels based on the TA value and the RSRP value if the signal-to-noise ratio (SNR) measurement value of the first wireless communication signal is greater than the preset SNR. The determining module is further configured to determine the highest transmission level among the plurality of radio frequency transmission levels as the second target level if the SNR measurement value is less than or equal to the preset signal-to-noise ratio; and to send a third wireless communication signal to the second terminal using the point-to-point communication link, the third wireless communication signal including information of the second target level, so that the second terminal sends the wireless communication signal using the transmission power of the second target level.

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