WO2023246322A1

WO2023246322A1 - Adaptive beam width determination method and system, base station and medium

Info

Publication number: WO2023246322A1
Application number: PCT/CN2023/092071
Authority: WO
Inventors: 陈智; 李玲香; 谢莎
Original assignee: 四川太赫兹通信有限公司
Priority date: 2022-06-21
Filing date: 2023-05-04
Publication date: 2023-12-28
Also published as: CN114785393B; CN114785393A

Abstract

The present application relates to the field of wireless communication, and sets forth an adaptive beam width determination method and system, a base station and a medium. The method comprises: according to a beam alignment probability in an ith time slot, obtaining the detection probability of the ith time slot and the communication rate of the ith time slot; within a beam width range where the detection probability of the ith time slot is greater than or equal to a preset detection threshold, using the ith time slot beam width where the communication rate is highest as the beam width of the ith time slot; or within a beam width range where the communication rate of the ith time slot is greater than or equal to a preset communication threshold, using the ith time slot beam width where the detection probability is highest as the beam width of the ith time slot. The method effectively solves problems in the prior art whereby, when radar-aided beam alignment is used, and in a scenario where a UE is moving at high-speed, the communication rate is reduced, radar is unable to detect a UE, or a wireless communication link is even unable to be established.

Description

An adaptive beam width determination method, system, base station and medium

Technical field

The present application relates to the field of wireless communications, and more specifically, to an adaptive beam width determination method, an adaptive beam width determination system, a base station and a computer-readable storage medium.

Background technique

With the development of wireless communication technology, terahertz frequency band communication has become an important and promising technology. Due to the short wavelength of terahertz, a large number of antennas can be integrated into smaller devices, reducing the cost of the device. Moreover, the use of terahertz signals can greatly improve the data transmission rate and the resolution of radar sensing.

On the basis of traditional beam alignment through beam training, the existing technology also uses radar-assisted beam alignment, and uses radar to identify the echo reflected by the user equipment to detect the user's position, thereby performing beam alignment with the user equipment, which can effectively Reduce communication time.

However, when the existing technology uses radar-assisted beam alignment, in a high-speed mobile scenario of the user equipment, the user equipment moves very fast, and the probability of beam alignment is reduced. The radar may not be able to detect the user equipment, and thus cannot assist the communication system in beam alignment. to successfully establish the wireless communication link.

On the other hand, if the user equipment moves away from the base station at a faster speed, the radar may not be able to detect the user equipment and cannot assist the communication system in beam alignment to successfully establish a wireless communication link; even if the communication link can still be established, the communication rate It may also be lowered.

Therefore, when the existing technology uses radar-assisted beam alignment, when the user equipment moves at high speed, there are problems such as the communication rate is reduced, the radar cannot detect the user equipment, and even the wireless communication link cannot be established.

Contents of the invention

The inventor of the present application discovered through long-term practice that when the existing technology uses radar-assisted beam alignment, on the one hand, the beam width is usually fixed, and the coverage range of the radar emission beam is fixed, and the user equipment can easily leave the coverage range of the beam, thus causing Beam misalignment, if you need to ensure that the beam alignment probability is not too low, you can adjust the beam width; on the other hand, the distance between the user equipment and the base station is changing. If the distance between the user equipment and the base station becomes larger, the radar The signal-to-noise ratio and communication signal-to-noise ratio are reduced, resulting in the problem that the radar cannot detect user equipment and the communication rate is reduced. If you need to ensure that the radar signal-to-noise ratio and communication signal-to-noise ratio are not too low, you can adjust the beam width.

Based on this, this application proposes an adaptive beam width determination method, based on the beam alignment probability of the i-th time slot Get the detection probability of the i-th time slot and the communication rate R ⁱ (α _i ,α _i-1 ) of the i-th time slot, where the beam alignment probability of the i-th time slot is a function of α _i and α _i-1 , α _i is the beam width of the i-th time slot, α _i-1 is the beam width of the i-1 time slot, and the detection probability is the successful detection of the radar at the base station The probability of user equipment, the communication rate is the rate at which the base station communicates with the user equipment; when the detection probability of the i-th time slot is greater than or equal to the preset detection threshold, the beam width range is obtained. Within the width range, the beam width when the communication rate of the i-th time slot is maximum is used as the beam width of the i-th time slot, so that the detection probability is not too low, ensuring that the radar can detect the user equipment, and increasing the communication rate. Maximum, ensuring better communication effect, or when the communication rate of the i-th time slot is greater than or equal to the preset communication threshold, the beam width range is obtained, and within the beam width range, the i-th time slot is The beam width when the detection probability is maximum is used as the beam width of the i-th time slot to prevent the communication rate from being too low and ensure a certain communication effect. It also maximizes the detection probability and ensures that the radar can better detect the user equipment. In this way, it can effectively solve the problems of the existing technology using radar-assisted beam alignment, such as the communication rate is reduced, the radar cannot detect the user equipment, and even the wireless communication link cannot be established when the user equipment moves at high speed.

In the first aspect, this application provides an adaptive beam width determination method, which method includes: S110. According to the beam alignment probability of the i-th time slot Get the detection probability of the i-th time slot and the communication rate R ⁱ (α _i ,α _i-1 ) of the i-th time slot, where the beam alignment probability of the i-th time slot is a function of α _i and α _i-1 , α _i is the beam width of the i-th time slot, α _i-1 is the beam width of the i-1 time slot, the detection probability is the probability that the radar at the base station successfully detects the user equipment, and the communication rate is The communication rate between the base station and the user equipment; S120. Within the beam width range when the detection probability of the i-th time slot is greater than or equal to the preset detection threshold, maximize the communication rate of the i-th time slot. The beam width at the time is taken as the beam width α _i of the i-th time slot, or within the beam width range when the communication rate of the i-th time slot is greater than or equal to the preset communication threshold, the i-th time slot is The beam width when the detection probability is maximum is used as the beam width α _i of the i-th time slot.

In a second aspect, this application also provides a base station, which includes a radar transmitter, or a communication radar dual-function transmitter; a radar receiver; a processor; a memory; and one or more applications, wherein the one or more An application program is stored in the memory and configured to be executed by the processor, and the one or more programs are configured to perform the above method.

In a third aspect, this application also provides an adaptive beam width determination system. The adaptive beam width determination system includes user equipment. The user equipment is configured to receive the beam transmitted by the base station as described above, and transmit the beam through the base station. The transmitted beam communicates; the base station as described above, the base station is used to transmit the beam through the radar transmitter or the communication radar dual-function transmitter, and identify the reflected beam by the user equipment through the radar receiver. echo, and communicate with the user equipment.

In a fourth aspect, the present application also provides a computer-readable storage medium, the computer-readable storage medium stores program code, and the program code can be called by a processor to execute the above method.

To sum up, this application has at least the following technical effects:

1. This application obtains the detection probability and communication rate based on the beam alignment probability. When the detection probability is greater than or equal to the preset detection threshold, the beam width range is obtained. Within this beam width range, the beam width at the maximum communication rate is used as the adjusted The beam width not only ensures that the detection probability is not too low, but also ensures that the radar can detect the user equipment, thus assisting the communication system in beam alignment to successfully establish a wireless communication link, while maximizing the communication rate and ensuring better communication effects. ; Or, obtain the detection probability and communication rate according to the beam alignment probability, and when the communication rate is greater than or equal to the preset communication threshold, obtain the beam width range. Within the beam width range, the beam width when the detection probability is maximum is used as the adjusted beam width. This not only prevents the communication rate from being too low and ensures a certain communication effect, but also maximizes the detection probability to ensure that the radar can better detect the user. equipment to assist communication systems in beam alignment to successfully establish reliable wireless communication links.

2. The adaptive beam width determination method provided in this application can adjust the beam width in real time to achieve high-accuracy and high-precision beam tracking.

3. The adaptive beam width determination method provided by this application can be adapted to high-speed mobile scenarios and applied to linear and nonlinear user equipment motion models with time-varying motion speeds.

Therefore, the solution provided by this application can effectively solve the problems existing in the existing technology using radar-assisted beam alignment when the user equipment moves at high speed, such as the communication rate is reduced, the radar cannot detect the user equipment, and even the wireless communication link cannot be established. .

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 shows a schematic flow chart of the adaptive beam width determination method provided in Embodiment 1 of the present application;

Figure 2 shows a schematic diagram of radar-assisted beam alignment provided in Embodiment 1 of the present application;

Figure 3 shows a schematic diagram of the relationship between the beam width and the angle of the user equipment provided in Embodiment 1 of the present application;

Figure 4 shows a schematic diagram of beam alignment through beam training provided in Embodiment 1 of the present application;

Figure 5 shows a schematic diagram of the beam scanning the entire search space provided in Embodiment 1 of the present application;

Figure 6 shows a structural block diagram of a base station provided in Embodiment 2 of the present application;

Figure 7 shows a structural block diagram of the adaptive beam width determination system provided in Embodiment 3 of the present application;

Figure 8 shows a structural block diagram of a computer-readable storage medium provided in Embodiment 4 of the present application.

Detailed ways

In order to enable those in the technical field to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only These are part of the embodiments of this application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

Currently, based on the traditional beam alignment through beam training, radar-assisted beam alignment can be used to identify the echo reflected by the user equipment through radar, thereby performing beam alignment with the user equipment.

However, when radar-assisted beam alignment is used, the beam width is usually fixed. In the high-speed mobile scenario of the user equipment, the user equipment moves very fast and the probability of beam alignment is reduced. The radar may not be able to detect the user equipment and thus cannot assist communication. The system performs beam alignment to successfully establish a wireless communication link.

On the other hand, if the user equipment moves away from the base station at a faster speed, the radar signal-to-noise ratio decreases because the distance between the user equipment and the base station becomes longer. When the radar signal-to-noise ratio is lower than the preset signal-to-noise ratio threshold, the radar cannot The user equipment is detected and cannot assist the communication system in beam alignment to successfully establish a wireless communication link; even if the communication link can still be established, the communication signal-to-noise ratio will be reduced, resulting in a reduction in communication rate.

Therefore, in order to solve the above defects, embodiments of the present application provide an adaptive beam width determination method, which method includes: based on the beam alignment probability of the i-th time slot Get the detection probability of the i-th time slot and the communication rate R ⁱ (α _i ,α _i-1 ) of the i-th time slot, where the beam alignment probability of the i-th time slot is a function of α _i and α _i-1 , α _i is the beam width of the i-th time slot, α _i-1 is the beam width of the i-1 time slot, and the detection probability is the successful detection of the radar at the base station The probability of user equipment, the communication rate is the rate at which the base station communicates with the user equipment; when the detection probability of the i-th time slot is greater than or equal to the preset detection threshold, the beam width range is obtained, Within this beam width range, the beam width when the communication rate of the i-th time slot is maximum is used as the beam width of the i-th time slot, so that the detection probability is not too low, ensuring that the radar can detect the user equipment, and Maximize the communication rate to ensure better communication effect, or when the communication rate of the i-th time slot is greater than or equal to the preset communication threshold, obtain the beam width range, and within the beam width range, the i-th time slot The beam width when the detection probability of the time slot is maximum is used as the beam width of the i-th time slot to prevent the communication rate from being too low and ensure a certain communication effect. It also maximizes the detection probability and ensures that the radar can better detect the user equipment. . In this way, it can effectively solve the problems of the existing technology using radar-assisted beam alignment, such as the communication rate is reduced, the radar cannot detect the user equipment, and even the wireless communication link cannot be established when the user equipment moves at high speed.

The adaptive beam width determination method involved in this application is introduced below.

Example 1

Please refer to FIG. 1 , which is a schematic flowchart of an adaptive beam width determination method provided in Embodiment 1 of the present application. In this embodiment, the beam transmitted by the base station may be a beam in the terahertz frequency band, and the adaptive beam width determination method may include the following steps:

Step S110: Beam alignment probability according to the i-th time slot Get the detection probability of the i-th time slot and the communication rate R ⁱ (α _i ,α _i-1 ) of the i-th time slot, where the beam alignment probability of the i-th time slot is a function of α _i and α _i-1 , α _i is the beam width of the i-th time slot, α _i-1 is the beam width of the i-1 time slot, and the detection probability is the successful detection of the radar at the base station The probability of user equipment, and the communication rate is the rate at which the base station communicates with the user equipment.

In the embodiment of the present application, the base station may use a radar detection system and a communication system to complete the method of the present application, or may use a dual-function radar communication system to complete the method of the present application.

In this embodiment of the present application, radar-assisted beam alignment is used. A radar transmitter or a communication radar dual-function transmitter can be set up at the base station, and a radar receiver can be set up. The base station sends beams to the user equipment through the radar transmitter or the communication radar dual-function transmitter. Specifically, the radiation pattern of the antenna can The cone model can also be used. Other models can also be used. This application takes the cone model as an example for explanation, as shown in Figure 2. Figure 2 is a schematic diagram of using radar to assist beam alignment. The fan-shaped area in Figure 2 is the coverage of the beam. range, when the beams emitted from the base station reach the user equipment, these beams will be reflected back to the base station by the user equipment, Figure 2 The dotted line in represents the echo reflected by the user equipment, and the dotted arrow represents the direction of the echo. The radar receiver of the base station identifies the reflected echo to determine the location of the user equipment.

When the user equipment moves quickly, it is easy to leave the coverage area of the beam, causing beam misalignment.

In the embodiment of this application, the beam alignment probability is the probability that the beam can reach the user equipment.

In an exemplary embodiment, the beam alignment probability of the i-th time slot is: in, is the angle of the beam transmitted by the base station in the i-th time slot, and θ _i is the angle of the i-th time slot of the user equipment.

As shown in Figure 3, Figure 3 is a schematic diagram of the relationship between the beam width and the angle of the user equipment. Taking the position of the base station as the origin and setting a ray with the base station as the endpoint, the arrow in Figure 3 indicates the direction of the ray. The angle of the beam transmitted by the base station in the i-th time slot It can be: the angle between the beam emission direction of the i-th time slot and the ray direction, the angle _θ of the i-th time slot of the user equipment can be: the connection between the user position and the base station position of the i-th time slot, and the ray angle. In the i-th time slot, to achieve beam alignment, the user equipment needs to be within the beam coverage, that is: That is:

for The probability, for probability, so that You can get That is, the probability of beam alignment can be obtained.

In an exemplary embodiment, if the angle of the beam transmitted by the base station in the i-th time slot The mean is μ _i and the variance is Gaussian distribution, then the beam alignment probability of the i-th time slot is: in, Error _i is the angle error of the i-th time slot, and Error _i is a function of α _i-1 .

in, and is the error function.

In the embodiment of this application, Error _i is the angle error of the i-th time slot. In the i-th time slot, the larger the Error _i is, the greater the deviation between the angle of the user equipment estimated by the radar and the actual angle of the user equipment. Right now The larger it is, the easier it is for the beam to misalign.

As an optional implementation, Error _i can be described by mean square error, such as:

in, is the radar signal-to-noise ratio at the base station in the i-1th time slot, specifically,

Among them, _Pt is the transmission power. N _t is: the number of antenna elements in the phased array of the radar transmitter at the base station or the communication radar dual-function transmitter. N _r is: the number of antenna elements in the phased array set up by the radar receiver at the base station.

G _t (α _i-1 ) is the transmitting antenna gain of the radar transmitter at the base station, or the communication radar dual-function transmitter, G _r (α _i-1 ) is the receiving antenna gain of the radar receiver at the base station, as a An optional implementation, if the radiation pattern of the antenna adopts a cone model, then

λ is the wavelength. σ is the radar scattering cross section, which represents the target's ability to reflect radar signals to the direction of the radar receiver. d is the distance between the base station and the user equipment. k is Boltzmann's constant, and k=1.38×10 ^-23 . T _st is the standard temperature, and T _st can be 290K (Kelvins, Kelvin). B is bandwidth. L is the system loss factor.

Therefore, it can be seen that Error _i is a function of α _i-1 .

As another optional implementation, Error _i can also be described by the root mean square error, such as:

Therefore, it can be seen that Error _i is a function of α _i-1 .

Taking Error _i described by mean square error as an example, substituting the value of Error _i into the formula of Γ _i (α _i-1 ) can be obtained: Therefore, it can be seen that the beam alignment probability of the i-th time slot is a function of α _i and α _i-1 .

In the embodiment of the present application, other probability distributions may also be used to calculate the beam alignment probability, and the present application does not place a limit on this.

In an exemplary embodiment, step S110 includes sub-step S111 and sub-step S112.

Sub-step S111: Beam alignment probability according to the i-th time slot Obtain the detection probability of the i-th time slot The method is: in, is the ranging probability of the i-th time slot.

Two conditions need to be met for the radar at the base station to successfully detect user equipment. First, the beam emitted by the base station is aligned with the user equipment. Second, the radar signal-to-noise ratio at the base station is greater than or equal to the preset signal-to-noise ratio threshold.

Therefore, the probability that the beam transmitted by the base station is aligned with the user equipment can be defined as the beam alignment probability And the probability that the radar signal-to-noise ratio at the base station is greater than or equal to the preset signal-to-noise ratio threshold can be defined as the ranging probability

The probability that the radar at the base station successfully detects the user equipment can be defined as the beam alignment probability and ranging probability product of .

In an exemplary embodiment, the ranging probability of the i-th time slot is: in, is the radar signal-to-noise ratio at the base station in the i-th time slot, and δ is the preset signal-to-noise ratio threshold.

in,

G _t (α _i ) is the transmit antenna gain of the radar transmitter at the base station, or the communication radar dual-function transmitter, G _r (α _i ) is the receive antenna gain of the radar receiver at the base station, as an optional implementation way, if the radiation pattern of the antenna adopts a cone model, then

In this embodiment of the present application, if the radar signal-to-noise ratio at the base station in the i-th time slot is greater than or equal to the preset signal-to-noise ratio threshold, the radar can detect the user equipment. Therefore, the ranging probability at this time is 1, The probability of the radar successfully detecting the user equipment is only related to the beam alignment probability. If the radar signal-to-noise ratio at the base station in the i-th time slot is less than the preset signal-to-noise ratio threshold, the radar cannot detect the user equipment. Therefore, the ranging probability is 0 at this time, regardless of the beam alignment probability. It is impossible for any radar to successfully detect user equipment.

Sub-step S112: Beam alignment probability according to the i-th time slot The method of obtaining the communication rate R ⁱ (α _i , α _i-1 ) of the i-th time slot is:

C ⁱ (α _i ) is the achievable data transmission rate in the i-th time slot, M _i (α _i ) is the number of times the base station needs to transmit a beam to scan the entire search space in the i-th time slot, and

In the embodiment of this application, refers to the beam alignment probability, Refers to the probability of beam misalignment.

When radar-assisted beam alignment fails, traditional beam alignment through beam training can be used. As shown in Figure 4, Figure 4 is a schematic diagram of beam alignment through beam training. Before each data transmission, the base station will send a beam to scan the entire search space to search for user equipment, that is, beam training. In each time slot, Beam training is performed first, and data transmission is performed after finding the user equipment, so this communication method takes more time.

As shown in Figure 5, Figure 5 is a schematic diagram of beam scanning the entire search space. When traditional beam alignment is performed through beam training, in the i-th time slot, M _i (α _i ) directional beams with fixed beam width α _i are used Scan the entire search space (0,2π]. If M _i (α _i ) is a decimal, round M _i (α _i ) up to an integer, that is

In an exemplary embodiment, the attainable data transmission rate of the i-th time slot is: Among them, B is the bandwidth, is the communication signal-to-noise ratio at the user equipment in the i-th time slot.

in,

Among them, _Pt is the transmission power. N _t is: the number of antenna elements in the phased array of the radar transmitter at the base station or the communication radar dual-function transmitter. N _u is: the number of antenna elements in the phased array set by the user.

G _t (α _i ) is the transmit antenna gain of the radar transmitter at the base station, or the communication radar dual-function transmitter, G _u (α _u ) is the antenna gain of the user equipment, α _u is the width of the beam generated by the user equipment, As an optional implementation, if the radiation patterns of the antennas all adopt a cone model, then As an optional implementation manner, if the user equipment has an ideal omnidirectional antenna, that is, α _u =2π, then G _u (α _u ) =1.

N ₀ is the received noise power of the user equipment, L _total is the total path loss in the terahertz frequency band, and c is the speed of light, f is the frequency, and k _a (f) is the medium absorption coefficient related to the frequency f.

Will N _u =1, as well as Substitute Available:

Step S120: Within the beam width range when the detection probability of the i-th time slot is greater than or equal to the preset detection threshold, use the beam width when the communication rate of the i-th time slot is maximum as the beam width of the i-th time slot. Beam width α _i , or within the beam width range when the communication rate of the i-th time slot is greater than or equal to the preset communication threshold, the beam width when the detection probability of the i-th time slot is maximum is regarded as the i-th time slot The beamwidth α _i of the time slot.

As an optional implementation manner, within the beam width range when the detection probability of the i-th time slot is greater than or equal to the preset detection threshold, the beam width when the communication rate of the i-th time slot is maximum is used as the beam width. The beam width α _i of i time slots can be: within the beam width range when the detection probability of each time slot is greater than or equal to the preset detection threshold, the cumulative value of the communication rate of all time slots is maximum. The beam width of each time slot is used as the adjusted beam width of each time slot, that is:

Among them, (P) refers to the problem to be solved, st refers to the constraint condition, N is the number of time slots, α is the set of beam widths from the 1st time slot to the Nth time slot, is the preset detection threshold.

In this embodiment, α ₀ is a known value. According to the value of α ₀ and The range of α ₁ can be obtained. Within this range, m values are assigned to α _1. According to the sum of m α ₁ values m α ₂ ranges can be obtained, and m values are assigned to α ₂ in each α ₂ range. According to the sum of m ² α ₂ values We can get m ² α ₃ ranges, and so on. In the embodiment of this application, the number of values assigned to α ₂ in each range of α ₂ may not be m, and this application does not limit this.

Accumulated value of communication rate for each time slot is a function of α ₀ , α ₁ , α ₂ ..., α _N. Calculate N based on the value of α ₀ , m α ₁ values, the range of m α ₂ corresponding to each α ₁ value,...the m ^N-1 range of α _N corresponding to each α _N-1 value The maximum value of the cumulative value of the communication rate of all time slots, and the beam width of each time slot when the cumulative value of the communication rate of all time slots is the maximum is used as the adjusted beam width of each time slot.

Specifically, if N=2, according to the value of α ₀ and The range of α ₁ can be obtained, and 2 values are assigned to α ₁ in this range. According to the first α ₁ value and A range of α ₂ can be obtained, based on the second α ₁ value and Another range of α ₂ can be obtained. According to the value of α ₀ , the first α ₁ value, and the range of α ₂ obtained from the first α ₁ value, calculate the first maximum value of the accumulated communication rate value of the two time slots; according to the value of α ₀ , the first Based on the two α ₁ values and the range of α ₂ obtained from the second α ₁ value, the second maximum value of the cumulative communication rate value of the two time slots is calculated. Compare the first maximum value and the second maximum value, obtain the larger value as the maximum value of the cumulative communication rate of all time slots, and use the α ₁ value and α ₂ value in this case as the adjusted beam width.

By determining the beam width in this way, the overall communication rate of all time slots can be maximized.

As another optional implementation, within the beam width range when the detection probability of the i-th time slot is greater than or equal to the preset detection threshold, the beam width when the communication rate of the i-th time slot is maximum is used as The beam width α _i of the i-th time slot can also be: the beam width range when the detection probability of each time slot is greater than or equal to the preset detection threshold. Within , the beam width when the average value of the cumulative communication rate of all time slots is the largest is used as the adjusted beam width of each time slot.

As another optional implementation, within the beam width range when the detection probability of the i-th time slot is greater than or equal to the preset detection threshold, the beam width when the communication rate of the i-th time slot is maximum is used as The beam width α _i of the i-th time slot can also be: within the beam width range when the detection probability of each time slot is greater than or equal to the preset detection threshold, the maximum communication rate of each time slot is The beam width of each time slot, as the adjusted beam width of each time slot.

In this embodiment, α ₀ is a known value. According to the value of α ₀ and The range of α ₁ can be obtained. The communication rate of the first time slot is a function of α ₁ and α _0. According to the value of α ₀ and the range of α ₁ , the maximum value of the communication rate of the first time slot is calculated, and the communication rate of the first time slot is obtained. The value of α ₁ when the communication rate of 1 time slot is maximum. By analogy, according to the value of α _N-1 and The range of α _N can be obtained. According to the value of α _N-1 and the range of α _N , the value of α _N when the communication rate of the Nth time slot is maximum can be obtained. The beam width of each time slot when the communication rate of each time slot is maximum is used as the adjusted beam width of each time slot.

By determining the beam width in this way, the communication rate for each time slot can be maximized.

As an optional implementation manner, within the beam width range when the communication rate of the i-th time slot is greater than or equal to the preset communication threshold, the beam width when the detection probability of the i-th time slot is maximum is used as the beam width. The beam width α _i of i time slots can be: within the beam width range when the communication rate of each time slot is greater than or equal to the preset communication threshold, each time when the accumulated value of the detection probability of all time slots is the maximum The beam width of each time slot is used as the adjusted beam width of each time slot, that is:

Among them, R ^th is the preset communication threshold.

By determining the beamwidth in this way, the overall detection probability of all time slots can be maximized.

As another optional implementation, within the beam width range when the communication rate of the i-th time slot is greater than or equal to the preset communication threshold, the beam width when the detection probability of the i-th time slot is maximum is used as The beam width α _i of the i-th time slot can also be: within the beam width range when the communication rate of each time slot is greater than or equal to the preset communication threshold, the maximum detection probability of each time slot is The beam width of each time slot, as the adjusted beam width of each time slot, is:

By determining the beamwidth in this way, the detection probability of each time slot can be maximized respectively.

Example 2

Please refer to Figure 6, which is a structural block diagram of a base station 600 provided in Embodiment 2 of the present application. The base station 600 in this application may include one or more of the following components: a radar transmitter or a communication radar dual-function transmitter 610; a radar receiver 620; a processor 630; a memory 640; and one or more application programs, where The one or more application programs are stored in the memory 640 and configured to be executed by the processor 630, and the one or more programs are configured to execute the method of Embodiment 1.

When the base station 600 includes a radar transmitter 610, the radar transmitter 610 refers to a radio device that provides a high-power radio frequency signal for the radar.

When the base station 600 includes a communication radar dual-function transmitter 610, the communication radar dual-function transmitter 610 refers to a radio device that provides both radar and communication functions on a single hardware platform.

Radar receiver 620 refers to a device in radar that amplifies, transforms and processes echo signals.

Processor 630 may include one or more processing cores. The processor 630 uses various interfaces and lines to connect various parts within the entire base station 600, by running or executing instructions, programs, code sets or instruction sets stored in the memory 640, and calling the instructions stored in the memory 640. The data in the processor 640 is used to perform various functions of the base station 600 and process data. Optionally, the processor 630 may adopt at least one of digital signal processing (Digital Signal Processing, DSP), field-programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). implemented in hardware form. The processor 630 may integrate one or a combination of a central processing unit (CPU) and a modem. Among them, the CPU mainly handles operating systems and applications, etc.; the modem is used to handle wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 630 and may be implemented solely through a communication chip.

The memory 640 may include random access memory (RAM) or read-only memory (Read-Only Memory, ROM). Memory 640 may be used to store instructions, programs, codes, sets of codes, or sets of instructions. The memory 640 may include a program storage area and a data storage area, where the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function, instructions for implementing various method embodiments described below, and the like. The storage data area can also store data created by the base station 600 during use, etc.

Example 3

Please refer to FIG. 7 , which is a structural block diagram of an adaptive beam width determination system 700 provided in Embodiment 3 of the present application. The adaptive beam width determination system 700 in this application may include: user equipment 710 and the base station 600 in Embodiment 2.

The user equipment 710 is configured to receive the beam transmitted by the base station 600 and communicate through the beam transmitted by the base station 600 .

The base station 600 is configured to transmit a beam through the radar transmitter or the communication radar dual-function transmitter 610, and identify the echo reflected by the user equipment 710 through the radar receiver 620, and communicate with the user equipment 710 communicate.

Example 4

Please refer to FIG. 8 , which is a structural block diagram of a computer-readable storage medium 800 provided in Embodiment 4 of the present application. The computer-readable storage medium 800 stores program code, which can be called by the processor to execute the method described in the above method embodiment.

Computer readable storage medium 800 may be, for example, flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM (Erasable Programmable Read Only Memory), hard disk, or ROM electronic memory. Optionally, the computer-readable storage medium 800 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 800 has storage space for program code 810 that performs any method steps in the above-described methods. These program codes may be read from or written to one or more computer program products. Program code 810 may, for example, be compressed in a suitable form.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: it can still Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

An adaptive beam width determination method, characterized in that the method includes:

S110. Beam alignment probability according to the i-th time slot Get the detection probability of the i-th time slot and the communication rate R i (α i ,α i-1 ) of the i-th time slot, where the beam alignment probability of the i-th time slot is a function of α i and α i-1 , α i is the beam width of the i-th time slot, α i-1 is the beam width of the i-1 time slot, and the detection probability is the successful detection of the radar at the base station The probability of user equipment, the communication rate is the rate at which the base station communicates with the user equipment;

S120. Within the beam width range when the detection probability of the i-th time slot is greater than or equal to the preset detection threshold, use the beam width when the communication rate of the i-th time slot is maximum as the beam of the i-th time slot. Width α i , or within the beam width range when the communication rate of the i-th time slot is greater than or equal to the preset communication threshold, the beam width when the detection probability of the i-th time slot is maximum is regarded as the i-th time slot The beam width α i of the slot.
The adaptive beam width determination method according to claim 1, characterized in that the beam alignment probability of the i-th time slot is: in, is the angle of the beam transmitted by the base station in the i-th time slot, and θ i is the angle of the i-th time slot of the user equipment.
The adaptive beam width determination method according to claim 2, characterized in that if the angle of the beam transmitted by the i-th time slot of the base station The mean is μ i and the variance is Gaussian distribution, then the beam alignment probability of the i-th time slot is: in, Error i is the angle error of the i-th time slot, and Error i is a function of α i-1 .
The adaptive beam width determination method according to claim 1, characterized in that step S110 includes:

According to the beam alignment probability of the i-th time slot Obtain the detection probability of the i-th time slot The method is: in, is the ranging probability of the i-th time slot.
The adaptive beam width determination method according to claim 4, characterized in that the ranging probability of the i-th time slot is: in, is the radar signal-to-noise ratio at the base station in the i-th time slot, and δ is the preset signal-to-noise ratio threshold.
The adaptive beam width determination method according to claim 1, characterized in that step S110 includes:

According to the beam alignment probability of the i-th time slot The method of obtaining the communication rate R i (α i , α i-1 ) of the i-th time slot is:

C i (α i ) is the achievable data transmission rate in the i-th time slot, M i (α i ) is the number of times the base station needs to transmit a beam to scan the entire search space in the i-th time slot, and
The adaptive beam width determination method according to claim 6, characterized in that the attainable data transmission rate of the i-th time slot is: Among them, B is the bandwidth, is the communication signal-to-noise ratio at the user equipment in the i-th time slot.
A base station is characterized by including:

Radar transmitter, or communications radar dual-function transmitter;

radar receiver;

processor;

memory;

One or more application programs, wherein said one or more application programs are stored in said memory and configured to be executed by said processor, said one or more programs are configured to perform as claimed in claim 1 -The method described in any one of 7.
An adaptive beam width determination system, characterized by including:

User equipment, the user equipment is configured to receive the beam transmitted by the base station according to claim 8, and communicate through the beam transmitted by the base station;

The base station according to claim 8, the base station is configured to transmit a beam through the radar transmitter or the communication radar dual-function transmitter, and identify the echo reflected by the user equipment through the radar receiver, and communicating with said user equipment.
A computer-readable storage medium, characterized in that program code is stored in the computer-readable storage medium, and the program code can be called by a processor to execute the method described in any one of claims 1-7.