Receiving and transmitting power adjusting method for radio system

Abstract

The invention relates to the technical field of transmit-receive power regulation, and particularly discloses a transmit-receive power regulation method for a radio system, which comprises the following steps of: S1, acquiring a transmit power range of a signal tower, and setting different transmit power values; under the transmitting power value, receiving power data of different position points are obtained, and a data set is formed; s2, according to the data set, calculating a constraint relationship between receiving and transmitting power, namely a relationship between receiving power and distance; s3, establishing a coordinate system on a horizontal plane, determining the positions of the signal tower and the vehicle, the speed of the vehicle and a planned driving path, and predicting the position of the vehicle after t time; s4, adjusting the transmitting power of the signal tower according to the real-time position, the speed and the planned driving path of the vehicle so as to keep the signal stable; the transmitting power of the signal tower is dynamically adjusted to adapt to the position change of the vehicle in the driving process, so that the stability of a communication signal is kept.

Description

Technical Field

[0001] The present invention relates to the technical field of transceiver power regulation, and in particular to a transceiver power regulation method for a radio system. Background Art

[0002] A radio system is a system that uses radio waves to transmit information and is widely used in communications, broadcasting, radar and other fields. Radio systems play a vital role in modern society, not only realizing the transmission and exchange of information, but also promoting scientific and technological progress and convenience of life. Common types of radio systems include mobile communication systems, satellite communication systems, broadcasting systems, radar systems and wireless local area networks.

[0003] The transmission power of a broadcasting system refers to the electrical intensity used by a radio station to send signals. This power is usually fixed, but modern broadcasting systems usually allow adjustment within a specific range. The adjustment of the transmission power can be achieved through the control panel or remote control system on the broadcasting transmission equipment. This ensures that the signal can be transmitted within the expected range, covering the target audience group without excessively interfering with the use of surrounding frequencies.

[0004] In the prior art, the coverage of signal towers is limited, and in order to maintain the service life of signal towers, signal towers generally do not use maximum transmission power to work; when vehicles travel quickly on the highway, they will constantly switch through the coverage areas of different signal towers; if the coverage of these signal towers does not overlap enough or there are coverage blind spots, it will cause broadcast signal interruptions and jams; and the coverage area of ​​the signal tower increases with the increase of transmission power, so how to adjust the transmission power of the signal tower to ensure that the broadcast signal is interrupted and jammed when the vehicle is traveling quickly on the highway is a problem we need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a method for adjusting the transmit and receive power of a radio system to solve the above technical problems.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for adjusting the transmit and receive power of a radio system comprises the following steps:

[0008] Step S1: obtaining a transmission power range of a signal tower, setting a number of transmission power values ​​according to the transmission power range, and obtaining a signal range radius when the signal tower uses different transmission power values; selecting a number of position points at equal intervals on the signal range radius;

[0009] When different transmit power values ​​are obtained, the received power at different locations is obtained, and the data set {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 is the received power at the first position point under the first transmission power value, and m is the total number of preset position points selected;

[0010] Step S2: Based on the data set, 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 is the received power, W tran is the transmission power, R is the signal range radius, R min is the initial signal range radius, s min =R min / m, is the interval of the position points on the initial signal range radius, i is the i-th position point on the signal range radius;

[0011] Step S3: Establish a rectangular coordinate system on the horizontal plane to obtain the coordinates P of the signal tower st , obtain the vehicle coordinates P in real time car and the vehicle speed v, and obtain the planned driving path of the vehicle; according to the vehicle speed v and the vehicle coordinate P car , obtain the coordinates of each vehicle after t time on the planned driving path, where t is the collection time interval; and select the coordinates of the vehicle farthest from the signal tower from the coordinates of each vehicle after t time, denoted as P car ′;

[0012] Step S4: According to P car ′、P st and the first constraint, obtain the adjustment value of the transmission power Where W tran ′ is the transmission power of the signal tower at the current moment, W rec ' is the minimum receiving power to maintain signal stability; the transmitting power of the signal tower at the next moment is adjusted according to the adjustment value.

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

[0014] The transmission power range is [W min , W max ], set a power interval threshold It, and the power interval threshold It satisfies the following second constraint: Where Z is a set of positive integers; minis the starting value, and it increases upward starting from the starting value, and each power interval threshold It is recorded as a transmission power value to obtain a plurality of transmission power values.

[0015] As a further solution of the present invention: the selection of the position point includes the point at a distance L=R from the signal tower on the signal range radius, and does not include the point at a distance L=0 from the signal tower on the signal range radius.

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

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

[0018] Set the maximum collection time interval t0, where the setting range of t0 is [0.5s, 1s], then the collection time interval Where ε is the preset unit mileage and ε>0.

[0019] As a further solution 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 When the signal tower transmits power at the next moment, it increases by W max -W tran '; When W = 0, no adjustment is made; When W < 0 and W tran ′-W≥W min When , the transmission power of the signal tower at the next moment is reduced by W;

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

[0022] As a further embodiment of the present invention: tran ′=W max When W < 0, the signal coverage of the next signal tower that the vehicle is about to enter is obtained according to the planned driving path of the vehicle, and the transmission power of the next signal tower is adjusted. The process includes:

[0023] The current signal tower is T1, and the next signal tower is T2; the transmission power of T1 and T2 is W respectively. max The signal coverage range at , and are denoted as R1 and R2 respectively;

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

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

[0026] Beneficial effects of the present invention:

[0027] In the prior art, the coverage of signal towers is limited. When a vehicle travels quickly on a highway, it will constantly switch through the coverage areas of different signal towers. If the coverage of these signal towers does not overlap enough or there are blind spots, the broadcast signal will be interrupted and jammed. The coverage area of ​​the signal tower increases with the increase of the transmission power. Therefore, how to adjust the transmission power of the signal tower to ensure that the broadcast signal is interrupted and jammed when the vehicle travels quickly on the highway is a problem we need to solve.

[0028] Compared with the prior art, the present invention obtains the transmission power range of the signal tower and sets different transmission power values; under the transmission power value, the receiving power data of different position points are obtained to form a data set; according to the data set, the constraint relationship of the transmitting and receiving power, that is, the relationship between the receiving power and the distance is calculated; a coordinate system is established on the horizontal plane to determine the position of the signal tower and the vehicle, as well as the speed and planned driving path of the vehicle, and predict the position of the vehicle at the next moment; according to the real-time position, speed and planned driving path of the vehicle, the transmission power of the signal tower is adjusted to keep the signal stable.

[0029] By dynamically adjusting the transmission power of the signal tower, the stability of the communication signal can be maintained according to the real-time position and speed of the vehicle, as well as the planned driving path. This is especially important when the vehicle is moving at high speed or driving in complex environments. By precisely controlling the transmission power, the power is increased only when necessary, thus avoiding energy waste, extending the service life of the equipment, and reducing maintenance costs. By considering factors such as the distance, position and speed between the signal tower and the vehicle, the solution can more accurately predict the required transmission power to ensure that the communication quality is always maintained at a high level. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Figure 1 The present invention is a structural schematic diagram of a method for regulating the transmit and receive power of a radio system. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also 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: obtaining a transmission power range of a signal tower, setting a number of transmission power values ​​according to the transmission power range, and obtaining a signal range radius when the signal tower uses different transmission power values; selecting a number of position points at equal intervals on the signal range radius;

[0035] When different transmit power values ​​are obtained, the received power at different locations is obtained, and the data set {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 is the received power at the first position point under the first transmission power value, and m is the total number of preset position points selected;

[0036] It should be noted that the signal range radius defines the maximum distance over which a signal tower can effectively transmit a signal;

[0037] It is understandable that by obtaining different transmission power values ​​of the signal tower and their corresponding signal range radius, we can understand the signal coverage under different powers, which shows that the transmission power directly affects the propagation distance and coverage of the signal; by measuring the received power at different locations, a received power data set is established. This data set reflects the attenuation of the signal in space under different transmission powers, which helps to understand the relationship between signal strength and distance;

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

[0039] The transmission power range is [W min , Wmax ], set a power interval threshold It, and the power interval threshold It satisfies the following second constraint: Where Z is a set of positive integers; min is a starting value, starting from the starting value and increasing upward, and each power interval threshold It is recorded as a transmission power value, to obtain a plurality of transmission power values;

[0040] It should be noted that, usually, the transmission power range of broadcasting is determined based on the coverage requirements, transmission distance and signal quality, technical standards and laws and regulations at the time; therefore, in actual situations, the transmission power range may be adjusted within a certain period of time according to the impact of weather conditions or geographical conditions on signal quality; therefore, the transmission power range [W min , W max ] varies within a certain range; W in the present invention min The current initial transmission power is determined based on the above factors, which is also the lowest transmission power of the current signal tower;

[0041] The selection of the position point includes the point at a distance L=R from the signal tower on the signal range radius, and excludes the point at a distance L=0 from the signal tower on the signal range radius;

[0042] It is understandable that, in the signal range radius, the selection of the location point should reflect the law of signal strength changing with distance, therefore, the location point includes the point at a distance L=R from the signal tower. For the point at a distance L=0 from the signal tower, these points are usually directly below the signal tower, and under normal circumstances, the vehicle cannot reach directly below the signal tower, so it is meaningless to be selected as a test location point.

[0043] Step S2: Based on the data set, 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 is the received power, W tran is the transmission power, R is the signal range radius, R min is the initial signal range radius, s min =R min / m, is the interval of the position points on the initial signal range radius, i is the i-th position point on the signal range radius;

[0044] It can be understood that within a certain time range, the environmental influencing factors remain unchanged, and the environmental influencing factors include weather conditions, humidity, and electromagnetic interference, etc.; and at this time, the vehicle maintains high speed, then the main factor affecting the received power of each point within the signal range is the propagation distance, that is, the loss from the transmitted power to the received power is mainly the path loss; the constraint indicates that the received power is proportional to the transmitted power and inversely proportional to the square of the distance; the impact factor E represents the impact on the signal quality under different environments;

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

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

[0047] Step S3: Establish a rectangular coordinate system on the horizontal plane to obtain the coordinates P of the signal tower st , obtain the vehicle coordinates P in real time car and vehicle speed v, and obtain the planned driving path of the vehicle; according to the vehicle speed v and the vehicle coordinate P car , obtain the coordinates of each vehicle after t time on the planned driving path, where t is the collection time interval; and select the coordinates of the vehicle farthest from the signal tower from the coordinates of each vehicle after t time, denoted as P car ′;

[0048] It should be noted that the planned driving path of the vehicle is obtained through the navigation terminal of the vehicle; the coordinates P car The distance vt moved on the curve is the path distance on the curve, not the straight-line distance translated in the rectangular coordinate system;

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

[0050] Set the maximum collection time interval t0, where the setting range of t0 is [0.5s, 1s], then the collection time interval Where ε is the preset unit mileage and ε>0;

[0051] It should be noted that the maximum collection time interval t0 ensures that the data collection frequency can capture enough data points, but will not be too frequent so that the processing is too complicated or too burdensome to the system; the actual collection time interval t is not simply the maximum value t0, but needs to be adjusted according to the vehicle speed v. This is because the vehicle speed will affect the density and quality of data collection. When the vehicle speed is fast, if the collection time interval is too long, the data may not be consistent and cannot accurately reflect the rapid movement of the vehicle; when the vehicle speed is slow, if the collection time interval is too short, too much redundant data may be collected. The preset unit mileage is a positive number obtained through experiments, which is used to adjust the relationship between the collection time interval and the vehicle speed, so that when the vehicle speed is fast, the collection time interval t will not become too small, thereby avoiding excessive data collection caused by high-speed driving. On the contrary, when the vehicle speed is slow, the existence of the preset unit mileage ε ensures that the collection time interval t will not become too large, thereby ensuring the continuity and integrity of the data.

[0052] Step S4: According to P car ′、P st and the first constraint, obtain the adjustment value of the transmission power Where W tran ′ is the transmission power of the signal tower at the current moment, W rec ' is the minimum receiving power to maintain signal stability; the transmitting power of the signal tower at the next moment is adjusted according to the adjustment value;

[0053] It is understandable that the above steps is the distance between the vehicle and the signal tower obtained according to the Euclidean distance formula; the minimum receiving power W rec 'Usually refers to the minimum power level at which the receiver can receive the broadcast signal clearly and without noise. Generally speaking, the minimum power at which FM broadcasts 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 be able 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 specifically 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 When the signal tower transmits power at the next moment, it increases by W max -Wtran '; When W = 0, no adjustment is made; When W < 0 and W tran ′-W≥W min When , the transmission power of the signal tower at the next moment is reduced by W;

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

[0057] It is understandable that when there is no vehicle connected to the signal within the signal coverage of the signal tower, in order to save energy and reduce unnecessary interference, the transmission power of the signal tower will be restored to the minimum value W min ;

[0058] When W tran ′=W max When W < 0, the signal coverage of the next signal tower that the vehicle is about to enter is obtained according to the planned driving path of the vehicle, and the transmission power of the next signal tower is adjusted. The process includes:

[0059] The current signal tower is T1, and the next signal tower is T2; the transmission power of T1 and T2 is W respectively. max The signal coverage range at , and are denoted as R1 and R2 respectively;

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

[0061] If F∩(R1∩R2)=0, the transmission power of T1 is not adjusted until the vehicle enters R2, at which time the transmission power of T2 is adjusted;

[0062] It should be noted that F∩(R1∩R2)≠0 means that there is an overlapping area between R1 and R2. car ′∈[F∩(R1∩R2)] indicates that the coordinates of the vehicle at the next moment are in the overlapping area, and F∩(R1∩R2)=0 indicates that there is no overlapping area between R1 and R2;

[0063] It is worth noting that the two signal towers in the present invention are signal towers that send the same signal; in the overlapping portion of the signal coverage of the two signal towers, the received power is usually not simply doubled, but the sum of the received power is greater than the power of a single signal.

[0064] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for adjusting the transmit and receive power of a radio system, characterized in that: The following steps are involved: Step S1: obtaining a transmission power range of a signal tower, setting a number of transmission power values ​​according to the transmission power range, and obtaining a signal range radius when the signal tower uses different transmission power values; selecting a number of position points at equal intervals on the signal range radius; When different transmit power values ​​are obtained, the received power at different locations is obtained, and the data set {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 is the received power at the first position point under the first transmission power value, and m is the total number of preset position points selected; Step S2: Based on the data set, 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 is the received power, W tran is the transmission power, R is the signal range radius, R min is the initial signal range radius, s min =R min / m, is the interval of the position points on the initial signal range radius, i is the i-th position point on the signal range radius; Step S3: Establish a rectangular coordinate system on the horizontal plane to obtain the coordinates P of the signal tower st , obtain the vehicle coordinates P in real time car and vehicle speed v, and obtain the planned driving path of the vehicle; according to the vehicle speed v and the vehicle coordinate P car , obtain the coordinates of each vehicle after t time on the planned driving path, where t is the collection time interval; and select the coordinates of the vehicle farthest from the signal tower from the coordinates of each vehicle after t time, denoted as P car ′; Step S4: According to P car ′、P st and the first constraint, obtain the adjustment value of the transmission power Where W tran ′ is the transmission power of the signal tower at the current moment, W rec ' is the minimum receiving power to maintain signal stability; the transmitting power of the signal tower at the next moment is adjusted according to the adjustment value.

2. A method for adjusting the transmit and receive power of a radio system according to claim 1, characterized in that: In step S1, the process of setting the transmit power value includes: The transmission power range is [W min , W max ], set a power interval threshold It, and the power interval threshold It satisfies the following second constraint: Where Z is a set of positive integers; min is the starting value, and it increases upward starting from the starting value, and each power interval threshold It is recorded as a transmission power value to obtain a plurality of transmission power values.

3. The method for adjusting the receiving and transmitting power of a radio system according to claim 1, characterized in that: In step S1, the selection of the position point includes the point at a distance L=R from the signal tower on the signal range radius, and excludes the point at a distance L=0 from the signal tower on the signal range radius.

4. The method for adjusting the receiving and transmitting power of a radio system according to claim 2, characterized in that: In step S2, the initial signal range radius is the transmission power W tran =W min The signal range radius at .

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

0.

6. The method for adjusting the receiving and transmitting power of a radio system according to claim 2, 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 specifically as follows: When W>0 and W tran ′+W≤W max When W>0 and W tran ′<W max And W tran ′+W≤W max When the signal tower transmits power at the next moment, it increases by W max -W tran '; When W = 0, no adjustment is made; When W < 0 and W tran ′-W≥W min When , the transmission power of the signal tower at the next moment is reduced by W; The signal coverage range is obtained in real time based on the signal range radius of the signal tower. When there is no vehicle connected to the signal within the signal coverage range of the signal tower, the transmission power of the signal tower is restored to W. min .

7. A method for adjusting the transmit and receive power of a radio system according to claim 6, characterized in that: In step S4, when W tran ′=W max When W < 0, the signal coverage of the next signal tower that the vehicle is about to enter is obtained according to the planned driving path of the vehicle, and the transmission power of the next signal tower is adjusted. The process includes: The current signal tower is T1, and the next signal tower is T2; the transmission power of T1 and T2 is W respectively. max The signal coverage range at , and are denoted as R1 and R2 respectively; If F∩(R1∩R2)≠0 and P car ′∈[F∩(R1∩R2)], then obtain the coordinates of T2, and according to P car ′ and constraint, and obtain the adjustment value W2 of T2; at this time, the transmit power of T1 is not adjusted, and the transmit power of T2 is adjusted according to the adjustment value W2 of T2.

8. The method for adjusting the receiving and transmitting power of a radio system according to claim 7, characterized in that: In step S4, if F∩(R1∩R2)=0, the transmission power of T1 is not adjusted until the vehicle enters R2, and then the transmission power of T2 is adjusted.

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