A method for adjusting the transmit power of a radio system

Abstract

The application relates to the field of transceiving power adjustment technology, and particularly discloses a transceiving power adjustment method for a radio system, which comprises the following steps: step S1: acquiring a transmission power range of a signal tower and setting different transmission power values; under the transmission power values, acquiring receiving power data of different position points to form a data set; step S2: according to the data set, calculating a constraint relationship of transceiving power, i.e. the relationship between the receiving power and the distance; step S3: establishing a coordinate system on a horizontal plane, determining the positions of the signal tower and the vehicle, and the speed and the planned driving path of the vehicle, and predicting the position of the vehicle after t time; step S4: according to the real-time position, the speed and the planned driving path of the vehicle, adjusting the transmission power of the signal tower to maintain signal stability; by dynamically adjusting the transmission power of the signal tower, the stability of the communication signal can be maintained by adapting to the position change of the vehicle in the driving process.

Description

Technical Field

[0001] This invention relates to the field of transmit and receive power adjustment technology, and more specifically to a method for adjusting transmit and receive power in a radio system. Background Technology

[0002] Radio systems are systems that use radio waves to transmit information and are widely used in fields such as communications, broadcasting, and radar. Radio systems play a vital role in modern society, not only enabling the transmission and exchange of information but also promoting technological progress and making life more convenient. Common types of radio systems include mobile communication systems, satellite communication systems, broadcasting systems, radar systems, and wireless local area networks (WLANs).

[0003] The transmission power of a broadcasting system refers to the electrical intensity used by a radio station when transmitting a signal. This power is usually fixed, but modern broadcasting systems typically allow for adjustment within a specific range. The transmission power can be adjusted via a control panel on the broadcasting equipment or a remote control system to ensure that the signal can propagate within the expected range, covering the target audience without excessively interfering with the use of surrounding frequencies.

[0004] In existing technologies, the coverage of signal towers is limited, and to maintain their lifespan, signal towers generally do not operate at maximum transmission power. When vehicles travel at high speeds on highways, they constantly switch between the coverage areas of different signal towers. If the coverage areas of these signal towers do not overlap sufficiently or there are coverage blind spots, it will cause interruptions and stuttering of the broadcast signal. Since the coverage area of ​​a signal tower increases with the increase of transmission power, how to adjust the transmission power of the signal towers to ensure that the broadcast signal is not interrupted or stuttered when vehicles are traveling at high speeds on highways is the problem we need to solve. Summary of the Invention

[0005] The purpose of this invention is to provide a method for adjusting the transmit and receive power of a radio system, thereby solving the above-mentioned technical problems.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A method for regulating transmit and receive power in a radio system includes the following steps:

[0008] Step S1: Obtain the transmission power range of the signal tower, set several transmission power values ​​according to the transmission power range, and obtain the signal range radius when the signal tower uses different transmission power values; select several location points at equal intervals on the signal range radius;

[0009] The received power at different locations is obtained when different transmit power values ​​are obtained, resulting in a dataset {J1, J2, ..., J...}. n}, where n is the total number of transmit power values, J1 is the receive power set under the first transmit power value, and J1={W rec-s1 W rec-s2 , ..., W rec-sm}, where W rec-s1 This represents the received power at the first location point under the first transmit power value, where m is the preset total number of location points to be selected.

[0010] Step S2: Based on the dataset, and the distance between the location point and the signal tower. The transmit and receive power satisfies the first constraint. Where E is the impact factor, W rec For received power, W tran R is the transmit power, and R is the signal range radius. min Let s be the initial signal range radius. min =R min / m represents the interval between position points on the initial signal range radius, and i represents the i-th position point on the signal range radius.

[0011] Step S3: Establish a rectangular coordinate system on the horizontal plane and obtain the coordinates P of the signal tower. st Real-time acquisition of vehicle coordinates P car Given the vehicle speed v, obtain the vehicle's planned travel path; based on the vehicle speed v and the vehicle's coordinates P... car The coordinates of each vehicle are obtained along the planned driving route after time t, where t is the data collection time interval. From the coordinates of all vehicles after time t, the coordinates of the vehicle furthest from the signal tower are selected and denoted as P. car ′;

[0012] Step S4: According to P car ′、P st Based on the first constraint, the adjustment value of the transmission power is obtained. Among them W tran ′ represents the current transmission power of the signal tower, W rec To maintain a stable signal, the minimum received power is set; the transmission power of the signal tower is adjusted according to the set adjustment value at the next moment.

[0013] As a further aspect of the present invention: the process of setting the transmission power value includes:

[0014] Let the range of transmission power be [W]. min W max A power interval threshold It is set, wherein the power interval threshold It satisfies the following second constraint: Where Z is the set of positive integers; and W minStarting from the initial value, the power is incremented upwards, and each power interval threshold It is recorded as a transmission power value, thus obtaining a number of transmission power values.

[0015] As a further aspect of the present invention: the selection of the location point includes points on the radius of the signal range that are at a distance L = R from the signal tower, but excludes points on the radius of the signal range that are at a distance L = 0 from the signal tower.

[0016] As a further aspect of the present invention: the initial signal range radius is the transmission power W. tran =W min The radius of the signal range at that time.

[0017] As a further aspect of the present invention: the process of setting the acquisition time interval includes:

[0018] Set a maximum data acquisition time interval t0, where t0 is set within the range of [0.5s, 1s]. Then, the data acquisition time interval... Where ε is a preset unit mileage and ε > 0.

[0019] As a further aspect of the present invention: the process of adjusting the transmission power of the signal tower at the next moment according to the adjustment value is specifically as follows:

[0020] When W > 0 and W tran ′+W≤W max When W > 0 and W tran ′<W max And W tran ′+W≤W max At that time, the transmission power of the signal tower will be increased by W at the next moment. max -W tran When W = 0, no adjustment is made; when W < 0 and W tran ′-W≥W min At that time, the transmission power of the signal tower will be reduced by W at the next moment;

[0021] The signal coverage area is determined in real time based on the signal range radius of the signal tower. When there are no vehicles connected to the signal within the signal coverage area of ​​the signal tower, the transmission power of the signal tower is restored to W. min .

[0022] As a further aspect of the present invention: when W tran ′=W max When W < 0, based on the vehicle's planned travel path, the signal coverage area of ​​the next signal tower the vehicle is about to enter is obtained, and the transmission power of the next signal tower is adjusted. The process includes:

[0023] Let the current signal tower be T1, and the next signal tower be T2; obtain the transmission power W for T1 and T2 respectively. max The signal coverage areas at that time are denoted as R1 and R2 respectively;

[0024] If F∩(R1∩R2)≠0 and P car If ′∈[F∩(R1∩R2)], then obtain the coordinates of T2, and according to P car By combining the constraints, the adjustment value W2 of T2 is obtained; at this time, the transmission power of T1 is not adjusted, and the transmission power of T2 is adjusted according to the adjustment value W2 of T2.

[0025] As a further aspect of the present invention: if F∩(R1∩R2)=0, then the transmission power of T1 is not adjusted until the vehicle enters R2, at which point the transmission power of T2 is adjusted.

[0026] The beneficial effects of this invention are:

[0027] In existing technologies, the coverage of signal towers is limited. When vehicles travel at high speeds on highways, they constantly switch between the coverage areas of different signal towers. If the coverage areas of these signal towers do not overlap sufficiently or there are coverage blind spots, it will cause the broadcast signal to be intermittent and choppy. Since the coverage area of ​​a signal tower increases with the increase of transmission power, how to adjust the transmission power of the signal towers to ensure that the broadcast signal is not intermittent and choppy when vehicles are traveling at high speeds on highways is the problem we need to solve.

[0028] Compared to existing technologies, this invention obtains the transmission power range of a signal tower and sets different transmission power values; under the transmission power value, it obtains the received power data at different locations to form a dataset; based on the dataset, it calculates the constraint relationship between transmission and reception power, i.e., the relationship between received power and distance; it establishes a coordinate system on a horizontal plane to determine the positions of the signal tower and the vehicle, as well as the vehicle's speed and planned travel path, and predicts the vehicle's position at the next moment; based on the vehicle's real-time position, speed, and planned travel path, it adjusts the transmission power of the signal tower to maintain signal stability.

[0029] By dynamically adjusting the transmission power of the signal tower, the stability of the communication signal can be maintained based on the real-time location and speed of the vehicle, as well as the planned travel path. This is especially important when vehicles are moving at high speeds or traveling in complex environments. By precisely controlling the transmission power, increasing power only when necessary avoids energy waste, extends equipment lifespan, and reduces maintenance costs. By considering factors such as the distance, location, and speed between the signal tower and the vehicle, the solution can more accurately predict the required transmission power, ensuring that communication quality is consistently maintained at a high level. Attached Figure Description

[0030] The invention will now be further described with reference to the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of a method for adjusting the transmit and receive power of a radio system according to the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1 As shown, the present invention is a method for adjusting the transmit and receive power of a radio system, comprising the following steps:

[0034] Step S1: Obtain the transmission power range of the signal tower, set several transmission power values ​​according to the transmission power range, and obtain the signal range radius when the signal tower uses different transmission power values; select several location points at equal intervals on the signal range radius;

[0035] The received power at different locations is obtained when different transmit power values ​​are obtained, resulting in a dataset {J1, J2, ..., J...}. n}, where n is the total number of transmit power values, J1 is the receive power set under the first transmit power value, and J1={W rec-s1 W rec-s2 , ..., W rec-sm}, where W rec-s1 This represents the received power at the first location point under the first transmit power value, where m is the preset total number of location points to be selected.

[0036] It should be noted that the signal range radius defines the farthest distance that the signal tower can effectively transmit signals;

[0037] Understandably, by obtaining different transmit power values ​​of signal towers and their corresponding signal range radii, we can understand the signal coverage under different power levels. This indicates that transmit power directly affects the signal propagation distance and coverage area. By measuring the received power at different locations, a received power dataset was established. This dataset reflects the signal attenuation in space under different transmit power levels, which helps to understand the relationship between signal strength and distance.

[0038] The process of setting the transmission power value includes:

[0039] Let the range of transmission power be [W]. min Wmax A power interval threshold It is set, wherein the power interval threshold It satisfies the following second constraint: Where Z is the set of positive integers; and W min Starting from the initial value, the power is incremented upwards, and each power interval threshold It is recorded as a transmission power value to obtain a number of transmission power values;

[0040] It should be noted that, generally, the range of broadcast transmission power is determined based on the coverage requirements, transmission distance and signal quality, technical standards, and laws and regulations at the time. Therefore, in practice, the transmission power range may be adjusted within a certain period of time based on the impact of weather or geographical conditions on signal quality. Thus, the transmission power range [W] min W max The value of W varies within a certain range; in this invention... min This is the current initial transmission power determined based on the above factors, and it is also the current lowest transmission power of the signal tower.

[0041] The selection of the location points includes points on the radius of the signal range that are at a distance L = R from the signal tower, but excludes points on the radius of the signal range that are at a distance L = 0 from the signal tower.

[0042] Understandably, within the signal range radius, the selection of test locations should reflect the pattern of signal strength variation with distance. Therefore, test locations include points at a distance L = R from the signal tower. Points at a distance L = 0 from the signal tower are typically located directly beneath it; under normal circumstances, vehicles cannot reach directly beneath the signal tower, making them unsuitable as test locations.

[0043] Step S2: Based on the dataset, and the distance between the location point and the signal tower. The transmit and receive power satisfies the first constraint. Where E is the impact factor, W rec For received power, W tran R is the transmit power, and R is the signal range radius. min Let s be the initial signal range radius. min =R min / m represents the interval between position points on the initial signal range radius, and i represents the i-th position point on the signal range radius.

[0044] It is understandable that, within a certain time frame, environmental influencing factors remain constant, including weather conditions, humidity, and electromagnetic interference; and the vehicle maintains high speed during this time. Therefore, the primary factor affecting the received power at each point within the signal range is the propagation distance, meaning the loss between the transmitted and received power is mainly path loss. This constraint indicates that the received power is directly proportional to the transmitted power and inversely proportional to the square of the distance. The influence factor E represents the impact on signal quality under different environmental conditions.

[0045] The initial signal range radius is the transmission power W. tran =W min The radius of the signal range at that time;

[0046] It is understood that the definition of the initial signal range radius provides a reference point for standardizing the signal coverage range under different transmission powers, so that the signal coverage range under different transmission powers can be determined by comparing it with this standard range;

[0047] Step S3: Establish a rectangular coordinate system on the horizontal plane and obtain the coordinates P of the signal tower. st Real-time acquisition of vehicle coordinates P car Given the vehicle speed v, obtain the vehicle's planned travel path; based on the vehicle speed v and the vehicle's coordinates P... car The coordinates of each vehicle are obtained along the planned driving route after time t, where t is the data collection time interval. From the coordinates of all vehicles after time t, the coordinates of the vehicle furthest from the signal tower are selected and denoted as P. car ′;

[0048] It should be noted that the planned driving route of the vehicle is obtained through the vehicle's navigation terminal; coordinate P car The distance vt that moves along the curve is the path distance along the curve, not the straight-line distance of translation in a Cartesian coordinate system;

[0049] The process of setting the acquisition time interval includes:

[0050] Set a maximum data acquisition time interval t0, where t0 is set within the range of [0.5s, 1s]. Then, the data acquisition time interval... Where ε is a preset unit mileage and ε > 0;

[0051] It should be noted that the maximum data acquisition interval t0 ensures that the data acquisition frequency is sufficient to capture enough data points without being too frequent, thus avoiding excessive processing complexity or system overload. The actual acquisition interval t used is not simply the maximum value t0, but needs to be adjusted according to the vehicle's speed v. This is because vehicle speed affects the density and quality of data acquisition. When the vehicle speed is high, if the acquisition interval is too long, the data may be discontinuous and fail to accurately reflect the vehicle's rapid movement; conversely, when the vehicle speed is low, if the acquisition interval is too short, too much redundant data may be collected. The preset unit mileage is a positive number, obtained experimentally, used to adjust the relationship between the acquisition interval and vehicle speed. This ensures that at high speeds, the acquisition interval t does not become too small, thus avoiding over-collection of data due to high-speed driving. Conversely, at low speeds, the preset unit mileage ε ensures that the acquisition interval t does not become too large, thus ensuring data continuity and integrity.

[0052] Step S4: According to P car ′、P st Based on the first constraint, the adjustment value of the transmission power is obtained. Among them W tran ′ represents the current transmission power of the signal tower, W rec To maintain a stable signal, the minimum received power is determined; the transmission power of the signal tower is adjusted according to the adjustment value at the next moment.

[0053] It is understandable that in the above steps The distance between the vehicle and the signal tower is calculated using the Euclidean distance formula; the minimum received power W rec ' ' usually refers to the minimum power level at which a receiver can receive a broadcast signal clearly and without noise. Generally speaking, the minimum power at which FM radio can be stably received in a typical car radio is about 0.3μW, which is equivalent to a receiving sensitivity of -110dBm. Car radios are usually designed to receive signals clearly at this power level.

[0054] The process of adjusting the transmission power of the signal tower at the next moment according to the adjustment value is as follows:

[0055] When W > 0 and W tran ′+W≤W max When W > 0 and W tran ′<W max And W tran ′+W≤W max At that time, the transmission power of the signal tower will be increased by W at the next moment. max -Wtran When W = 0, no adjustment is made; when W < 0 and W tran ′-W≥W min At that time, the transmission power of the signal tower will be reduced by W at the next moment;

[0056] The signal coverage area is determined in real time based on the signal range radius of the signal tower. When there are no vehicles connected to the signal within the signal coverage area of ​​the signal tower, the transmission power of the signal tower is restored to W. min ;

[0057] Understandably, when there are no vehicles connected to the signal within the signal coverage area of ​​the signal tower, the tower's transmission power will be restored to its minimum value (W) in order to save energy and reduce unnecessary interference. min ;

[0058] When W tran ′=W max When W < 0, based on the vehicle's planned travel path, the signal coverage area of ​​the next signal tower the vehicle is about to enter is obtained, and the transmission power of the next signal tower is adjusted. The process includes:

[0059] Let the current signal tower be T1, and the next signal tower be T2; obtain the transmission power W for T1 and T2 respectively. max The signal coverage areas at that time are denoted as R1 and R2 respectively;

[0060] If F∩(R1∩R2)≠0 and P car If ′∈[F∩(R1∩R2)], then obtain the coordinates of T2, and according to P car By considering the constraints, the adjustment value W2 of T2 is obtained; at this time, the transmission power of T1 is not adjusted, and the transmission power of T2 is adjusted according to the adjustment value W2 of T2.

[0061] If F∩(R1∩R2)=0, then the transmission power of T1 will not be adjusted until the vehicle enters R2, at which point the transmission power of T2 will be adjusted.

[0062] It should be noted that F∩(R1∩R2)≠0 indicates that R1 and R2 have overlapping regions, and P car ′∈[F∩(R1∩R2)] indicates that the vehicle's coordinates at the next moment are within the overlapping region, and F∩(R1∩R2)=0 indicates that R1 and R2 do not have an overlapping region;

[0063] It is worth noting that the two signal towers in this invention are signal towers that transmit the same signal; in the part where the signal coverage of the two signal towers overlaps, the received power usually does not simply double, but the sum of the received power is greater than the power of a single signal.

[0064] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A method for adjusting transmit and receive power in a radio system, characterized in that, Includes the following steps: Step S1: Obtain the transmission power range of the signal tower, set several transmission power values ​​according to the transmission power range, and obtain the signal range radius when the signal tower uses different transmission power values; select several location points at equal intervals on the signal range radius; The received power at different locations is obtained when different transmit power values ​​are obtained, resulting in a dataset {J1, J2, ..., J...}. n }, where n is the total number of transmit power values, J1 is the receive power set under the first transmit power value, and J1={W rec-s1 W rec-s2 , ..., W rec-sm }, where W rec-s1 This represents the received power at the first location point under the first transmit power value, where m is the preset total number of location points to be selected. Step S2: Based on the dataset, and the distance between the location point and the signal tower. The transmit and receive power satisfies the first constraint. Where E is the impact factor, and W rec For received power, W tran R is the transmit power, and R is the signal range radius. min Let s be the initial signal range radius. min =R min / m represents the interval between position points on the initial signal range radius, and i represents the i-th position point on the signal range radius. Step S3: Establish a rectangular coordinate system on the horizontal plane and obtain the coordinates P of the signal tower. st Real-time acquisition of vehicle coordinates P car Given the vehicle speed v, obtain the vehicle's planned travel path; based on the vehicle speed v and the vehicle's coordinates P... car The coordinates of each vehicle are obtained along the planned driving route after time t, where t is the data collection time interval. From the coordinates of all vehicles after time t, the coordinates of the vehicle furthest from the signal tower are selected and denoted as P. car ′; Step S4: According to P car ′、P st Based on the first constraint, the adjustment value of the transmission power is obtained. W tran ′ represents the current transmission power of the signal tower, W rec The minimum received power to maintain signal stability; The transmission power of the signal tower is adjusted according to the adjustment value at the next moment; In step S1, the process of setting the transmit power value includes: Let the range of transmission power be [W]. min W max A power interval threshold It is set, wherein the power interval threshold It satisfies the following second constraint: , where Z is the set of positive integers; and W min Starting from the initial value, the power is incremented upwards, and each power interval threshold It is recorded as a transmission power value to obtain a number of transmission power values; In step S1, the selection of the location point includes points on the radius of the signal range that are at a distance L=R from the signal tower, but excludes points on the radius of the signal range that are at a distance L=0 from the signal tower.

2. The method for adjusting transmit and receive power in a radio system according to claim 1, characterized in that, In step S2, the initial signal range radius is the transmit power W. tran =W min The radius of the signal range at that time.

3. The method for adjusting transmit and receive power in a radio system according to claim 1, characterized in that, In step S3, the process of setting the acquisition time interval includes: Set a maximum data acquisition time interval t0, where t0 is set within the range of [0.5s, 1s]. Then, the data acquisition time interval... , where ε is a preset unit mileage and ε>

0.

4. The method for adjusting transmit and receive power in a radio system according to claim 1, characterized in that, In step S4, the process of adjusting the transmission power of the signal tower at the next moment according to the adjustment value is as follows: When W > 0 and W tran ′+W≤W max When W > 0 and W > 0, the transmission power of the signal tower will be increased by W. tran ′<W max And W tran ′+W≤W max At that time, the transmission power of the signal tower will be increased by W at the next moment. max -W tran When W=0, no adjustment is made; when W<0 and W tran ′-W≥W min At that time, the transmission power of the signal tower will be reduced by W at the next moment; The signal coverage area is determined in real time based on the signal range radius of the signal tower. When there are no vehicles connected to the signal within the signal coverage area of ​​the signal tower, the transmission power of the signal tower is restored to W. min .

5. The method for adjusting transmit and receive power in a radio system according to claim 4, characterized in that, In step S4, when W tran ′=W max When W < 0, based on the vehicle's planned travel path, the signal coverage area of ​​the next signal tower the vehicle is about to enter is obtained, and the transmission power of the next signal tower is adjusted. The process includes: Let the current signal tower be T1, and the next signal tower be T2; obtain the transmission power W for T1 and T2 respectively. max The signal coverage areas at that time are denoted as R1 and R2 respectively; If F∩(R1∩R2)≠0 and P car If ′∈[F∩(R1∩R2)], then obtain the coordinates of T2, and according to P car By combining the constraints, the adjustment value W2 of T2 is obtained; at this time, the transmission power of T1 is not adjusted, and the transmission power of T2 is adjusted according to the adjustment value W2 of T2.

6. A method for adjusting transmit and receive power in a radio system according to claim 5, characterized in that, In step S4, if F∩(R1∩R2)=0, the transmission power of T1 is not adjusted until the vehicle enters R2, at which point the transmission power of T2 is adjusted.

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