CN114222342B - Communication terminal entering area judging method, system and computer storage medium based on dynamic RSRP threshold - Google Patents
Communication terminal entering area judging method, system and computer storage medium based on dynamic RSRP threshold Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
Abstract
The invention relates to a communication terminal entering area judging method based on a dynamic RSRP threshold, which comprises the steps of dynamically adjusting the set fixed RSRP threshold into the dynamic RSRP threshold according to weather conditions and the geographic environment of a base station; and monitoring the actual RSRP of the target base station in the moving process of the vehicle-mounted terminal, and judging that the vehicle-mounted terminal enters a signal overlapping area with the target base station when the actual RSRP is larger than or equal to the dynamic RSRP threshold value. The invention also relates to a computer readable storage medium and a communication terminal ingress decision system based on a dynamic RSRP threshold. According to the method and the device, the RSRP threshold can be dynamically adjusted according to weather conditions and geographic conditions of the target base station, so that whether the vehicle-mounted terminal enters the signal overlapping area of the target base station can be accurately judged under various conditions, and the vehicle-mounted terminal can reliably conduct subsequent communication link switching.
Description
Technical Field
The present invention relates to the field of communications, and more particularly, to a method, a system, and a computer storage medium for determining a communication terminal entering area based on a dynamic RSRP threshold.
Background
With the development of intelligent railways, higher requirements are put on the data volume and real-time performance of train-ground communication transmission. Today, the 5G millimeter wave technology is adopted for high-speed railway communication, but the coverage distance of the millimeter wave antenna is usually less than 10 km, so that the vehicle-mounted terminal is required to be handed off between the base stations. When the communication link is switched, the vehicle-mounted terminal needs to be judged to enter the signal overlapping area, and then the switching is carried out according to a switching algorithm. Currently, a reference signal received power (Reference Signal Received Power, RSRP) threshold set by the target base station is generally used to determine whether the terminal enters a signal overlap region between the current base station and the target base station.
However, the prior art has the defect that the threshold value of each base station RSRP is a fixed value which is set uniformly, but the communication condition of the vehicle-mounted terminal and the target base station is affected by weather conditions and the geographic environment of the base station during the running process of the vehicle, and when different weather conditions and different geographic environment target base stations are needed to be communicated, the condition that the vehicle-mounted terminal does not enter a signal overlapping region and enters the signal overlapping region in a premature false judgment and enters the signal overlapping region in a delayed false judgment and exits the signal overlapping region can be caused by using the fixed RSRP threshold value, and the switching of a communication link can be affected.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a communication terminal entering area judging method, a communication terminal entering area judging system and a communication terminal entering area judging computer storage medium based on a dynamic RSRP threshold, wherein the RSRP threshold can be dynamically adjusted according to weather conditions and geographic conditions of a target base station, so that whether a vehicle-mounted terminal enters a signal overlapping area of the target base station can be accurately judged under various conditions, and the vehicle-mounted terminal can reliably conduct subsequent communication link switching.
The technical scheme adopted for solving the technical problems is as follows: a communication terminal entering area judging method based on dynamic RSRP threshold is constructed, which comprises the following steps:
s1, dynamically adjusting a set fixed RSRP threshold to be a dynamic RSRP threshold according to weather conditions and the geographic environment of a base station;
s2, monitoring the actual RSRP of a target base station in the moving process of the vehicle-mounted terminal, and judging that the vehicle-mounted terminal enters a signal overlapping area with the target base station when the actual RSRP is larger than or equal to the dynamic RSRP threshold value.
In the method for determining the entering area of the communication terminal based on the dynamic RSRP threshold of the present invention, the step S1 further includes:
s11, calculating the dynamic RSRP threshold based on weather influence factor kappa, shadow fall-off delta S and the fixed RSRP threshold:
P′＝κP-(κ-1)Pt(x)-ΔS；
wherein P represents the fixed RSRP threshold, P' represents the dynamic RSRP threshold, and Pt (x) represents the transmission power of the vehicle-mounted terminal.
In the method for determining a communication terminal entering area based on a dynamic RSRP threshold of the present invention, the step S11 further includes:
s111, the actual RSRP of the target base station j is denoted as RSRP (x, j) =pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) represents the path loss of the transmit power when the signal reaches the target base station j, and S (x, j, σ) represents the shadow fading of the transmit power when the signal reaches the target base station j;
s112, representing a target base station j under set weather conditions as an adjustment target base station j ', and representing an actual adjustment RSRP of the adjustment target base station j ' as RSRP (x, j ') =pt (x) -PL (x, j ') -S (x, j ', σ '), wherein PL (x, j ') represents a path loss of transmission power when a signal is transmitted to the adjustment target base station j ', and S (x, j ', σ ') represents a shadow fading of transmission power when a signal is transmitted to the adjustment target base station j ';
s113, expressing the path loss of the transmission power of the signal to the target base station j ' as PL (x, j ') (kappa PL (x, j)) by using the weather influence factor kappa and the path loss PL (x, j) of the transmission power of the signal to the target base station j ', thereby obtaining RSRP (x, j ') (Pt (x) -PL (x, j ') -S (x, j ', sigma ') (Pt (x) -kappa PL (x, j ') and sigma ');
s114, setting the threshold value of the adjustment target base station j 'to the dynamic RSRP threshold value P', thereby obtaining an RSRP decision condition RSRP (x, j ')=pt (x) - κpl (x, j) -S (x, j', σ ')Σp';
s114, obtaining a transformation formula (one) kappa Pt (x) -kappa PL (x, j) -kappa S (x, j, sigma) not less than kappa P based on RSRP judgment conditions Pt (x) -PL (x, j) -S (x, j, sigma) not less than P of the target base station j and the weather influence factor kappa;
s115, processing the transformation formula (I) to obtain a transformation formula (II) Pt (x) -kappa PL (x, j) -S (x, j ', sigma') equal to or greater than kappa P- (kappa-1) Pt (x, j ', sigma') +kappa S (x, j, sigma) =kappa P- (kappa-1) Pt (x) -delta S, delta S=S (x, j ', sigma') -kappa S (x, j, sigma);
s116, obtaining the dynamic RSRP threshold based on the transformation formula (two): p' =κp- (κ -1) Pt (x) - Δs.
Another technical solution adopted by the present invention to solve the technical problem is to construct a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the communication terminal entering area determination method based on the dynamic RSRP threshold.
The invention solves the technical problem by adopting a further technical scheme that a communication terminal entering area judging system based on a dynamic RSRP threshold is constructed, and the system comprises:
the dynamic RSRP threshold adjustment module is used for dynamically adjusting the set fixed RSRP threshold into a dynamic RSRP threshold according to weather conditions and the geographic environment of the base station;
and the judging module is used for monitoring the actual RSRP of the target base station in the moving process of the vehicle-mounted terminal, and judging that the vehicle-mounted terminal enters a signal overlapping area with the target base station when the actual RSRP is greater than or equal to the dynamic RSRP threshold value.
In the communication terminal entering area determination system based on the dynamic RSRP threshold of the present invention, the dynamic RSRP threshold adjustment module is further configured to:
calculating the dynamic RSRP threshold based on weather-influencing factor k, shadow fall-off Δs and the fixed RSRP threshold:
P′＝κP-(κ-1)Pt(x)-ΔS；
wherein P represents the fixed RSRP threshold, P' represents the dynamic RSRP threshold, and Pt (x) represents the transmission power of the vehicle-mounted terminal.
In the communication terminal entering area determination system based on the dynamic RSRP threshold of the present invention, the dynamic RSRP threshold adjustment module is further configured to:
the actual RSRP of the target base station j is denoted as RSRP (x, j) =pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) denotes the path loss of the transmit power when the signal is to the target base station j and S (x, j, σ) denotes the shadow fading of the transmit power when the signal is to the target base station j;
the method comprises the steps of representing a target base station j under set weather conditions as an adjustment target base station j ', and representing the actual adjustment RSRP of the adjustment target base station j ' as RSRP (x, j ')=Pt (x) -PL (x, j ') -S (x, j ', sigma '), wherein PL (x, j ') represents the path loss of transmission power when a signal reaches the adjustment target base station j ', and S (x, j ', sigma ') represents shadow fading of the transmission power when the signal reaches the adjustment target base station j ';
expressing the path loss of the transmission power of the signal to the target base station j ' as PL (x, j ')Σpl (x, j) by using the weather-effect factor κ and the path loss PL (x, j) of the transmission power of the signal to the target base station j ', thereby obtaining RSRP (x, j ')=pt (x) -PL (x, j ') -S (x, j ', σ ')=pt (x) - κpl (x, j ', σ ');
setting the threshold value of the adjustment target base station j 'to the dynamic RSRP threshold value P', thereby obtaining an RSRP decision condition RSRP (x, j ') =pt (x) - κpl (x, j) -S (x, j', σ ') ∈p';
obtaining a transformation formula (one) kPt (x) -kPL (x, j) -kS (x, j, sigma) not less than kP based on RSRP decision conditions Pt (x) -PL (x, j) -S (x, j, sigma) not less than P of the target base station j and the weather influence factor kP;
processing the transformation formula (one) to obtain a transformation formula (two) Pt (x) -kappa PL (x, j) -S (x, j ', σ') ∈p- (kappa-1) Pt (x, j ', σ') ++κs (x, j, σ) =kappa P- (kappa-1) Pt (x) - Δs, Δs=s (x, j ', σ') - κs (x, j, σ);
obtaining the dynamic RSRP threshold based on the transform equation (two): p' =κp- (κ -1) Pt (x) - Δs.
By implementing the communication terminal entering area judging method, the communication terminal entering area judging system and the computer storage medium based on the dynamic RSRP threshold, the RSRP threshold can be dynamically adjusted according to weather conditions and geographic conditions of the target base station, so that whether the vehicle-mounted terminal enters a signal overlapping area of the target base station can be accurately judged under various conditions, and the vehicle-mounted terminal can reliably conduct subsequent communication link switching conveniently.
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The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of a preferred embodiment of a communication terminal ingress decision method based on dynamic RSRP threshold in accordance with the present invention;
fig. 2 is a functional block diagram of a preferred embodiment of the communication terminal ingress decision system based on dynamic RSRP threshold of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention relates to a communication terminal entering area judging method based on a dynamic RSRP threshold, which comprises the steps of dynamically adjusting the set fixed RSRP threshold into the dynamic RSRP threshold according to weather conditions and the geographic environment of a base station; and monitoring the actual RSRP of the target base station in the moving process of the vehicle-mounted terminal, and judging that the vehicle-mounted terminal enters a signal overlapping area with the target base station when the actual RSRP is larger than or equal to the dynamic RSRP threshold value. By implementing the communication terminal entering area judging method based on the dynamic RSRP threshold, the RSRP threshold can be dynamically adjusted according to weather conditions and geographic conditions of the target base station, so that whether the vehicle-mounted terminal enters a signal overlapping area of the target base station can be accurately judged under various conditions, and the vehicle-mounted terminal can reliably conduct subsequent communication link switching.
Fig. 1 is a flow chart of a preferred embodiment of the communication terminal ingress decision method based on dynamic RSRP threshold of the present invention. As shown in fig. 1, in step S1, the set fixed RSRP threshold is dynamically adjusted to a dynamic RSRP threshold according to weather conditions and the geographical environment of the base station. In a preferred embodiment of the invention, the dynamic RSRP threshold is calculated based on the weather effect factor κ, the shadow fall-off Δs and the fixed RSRP threshold:
P′＝κP-(κ-1)Pt(x)-ΔS；
wherein P represents the fixed RSRP threshold, P' represents the dynamic RSRP threshold, and Pt (x) represents the transmission power of the vehicle-mounted terminal.
In step S2, during the movement of the vehicle-mounted terminal, monitoring the actual RSRP of the target base station, and when the actual RSRP is greater than or equal to the dynamic RSRP threshold, determining that the vehicle-mounted terminal enters a signal overlapping region with the target base station.
In particular, in a further preferred embodiment of the invention, the specific calculation and derivation of the dynamic RSRP threshold P' is described below.
And setting a unified RSRP threshold of each base station as P, and when the RSRP judgment condition of the target base station j is RSRP (x, j) more than or equal to P, entering a signal overlapping area of the current base station and the target base station j by the vehicle-mounted terminal x. Thus, the actual RSRP (x, j) of the target base station may be expressed as RSRP (x, j) =pt (x) -PL (x, j) -S (x, j, σ), pt (x) representing the transmit power of the vehicle terminal, PL (x, j) representing the path loss of the transmit power when the signal reaches the target base station j, and S (x, j, σ) representing the shadow fading of the transmit power when the signal reaches the target base station j. That is, pt (x) -PL (x, j) -S (x, j, sigma) P may be determined when the in-vehicle terminal enters the signal overlap region of the target base station j.
The signal transmission power is attenuated more due to weather conditions, such as severe weather. At this time, the target base station j under the set weather condition is denoted as an adjustment target base station j ', and the actual adjustment RSRP of the adjustment target base station j ' is denoted as RSRP (x, j ') =pt (x) -PL (x, j ') -S (x, j ', σ '), where Pt (x) denotes the transmission power of the vehicle-mounted terminal, PL (x, j ') denotes the path loss of the transmission power when the signal is to the adjustment target base station j ', and S (x, j ', σ ') denotes the shadow fading of the transmission power when the signal is to the adjustment target base station j '.
Since the respective base stations and signal overlapping regions are usually arranged equidistantly, the path loss of the vehicle terminal from the different overlapping regions to the different target base stations is substantially the same under the condition of unchanged weather, so that under the set weather conditions (such as bad weather conditions), the path loss of the transmission power from the signal to the adjustment target base station j 'will be affected by the weather influence factor κ, at this time, the path loss of the transmission power from the signal to the adjustment target base station j' can be expressed as PL (x, j ') Σpl (x, j') while the shadow fading loss is mainly affected by the geographical environment in which the base station is located, and the weather influence is not great, and therefore, at this time, the actual adjustment RSRP of the adjustment target base station j 'can be expressed as RSRP (x, j')=pt (x) -PL (x, j ') -S (x, j')σ=pt (x) - κpl (x, j ')=κpl (x, j').
Assuming that the threshold value of the adjustment target base station j 'is set to the dynamic RSRP threshold value P', thereby obtaining an RSRP decision condition RSRP (x, j ')=pt (x) - κpl (x, j) -S (x, j', σ ')Σ·p'; i.e., pt (x) -kappa PL (x, j) -S (x, j ', sigma') is greater than or equal to P ', it can be determined that the vehicle-mounted terminal enters a signal overlap region with the target base station P'. At this point, the dynamic RSRP threshold P' may be piled using a mathematical transformation.
Firstly, a transformation type (one) is obtained based on RSRP decision conditions Pt (x) -PL (x, j) -S (x, j, sigma) gtoreq P of the target base station j and the weather influence factor kappa
κPt(x)-κPL(x,j)-κS(x,j,σ)≥κP。
The following formulas are added to both sides of the transformation formula (one):
P-(κ-1)Pt(x)-S(x,j′,σ′)+κS(x,j,σ)；
the symbol of the transformation (one) does not change, and the transformation (three) can be obtained
κPt(x)-(κ-1)Pt(x)-κPL(x,j)-κS(x,j,σ)-S(x,j′,σ′)+κS(x,j,σ)≥κP-(κ-1)Pt (x)-S(x,j′,σ′)+κS(x,j,σ)
By calculating the transformation formula (III), a transformation formula (II) can be obtained
Pt (x) -kappa PL (x, j) -S (x, j ', sigma') is equal to or greater than kappa P- (kappa-1) Pt (x) -S (x, j ', sigma') +kappa S (x, j, sigma) =kappa P- (kappa-1) Pt (x) -delta S, delta S=S (x, j ', sigma') -kappa S (x, j, sigma), delta S being the shadow fall-off.
That is, as can be obtained by the transformation formula (two), when RSRP (x, j ') is equal to or greater than κp- (κ -1) Pt (x) - Δs, it can be determined that the vehicle terminal enters the signal overlapping region of the target base station j' under the set weather condition (for example, in the severe weather condition), and then the dynamic RSRP threshold value can be considered to be set under the set weather condition (for example, in the severe weather condition): p' =κp- (κ -1) Pt (x) - Δs.
It should be noted that, in a preferred embodiment of the present invention, the weather influencing factor κ and the shadow fall Δs may be empirically valued, for example, obtained by statistically analyzing the RSRP threshold value in normal weather and the experimentally measured RSRP threshold value adjusted by each base station in various bad weather.
Furthermore, in another preferred embodiment of the present invention, RSRP threshold data and weather factor data (wind power, rainfall, temperature, lightning, etc.) in normal weather may be used as input, and the adjusted RRSRP threshold, weather influencing factor k and shadow attenuation difference Δs of each base station in various bad weather detected by experiment may be used as comparison output, and the neural network may be trained to obtain a neural network model capable of predicting the weather influencing factor k and shadow attenuation difference Δs and the adjusted RSRP threshold, and the RSRP threshold may be dynamically adjusted directly through the neural network model in subsequent bad weather.
Those skilled in the art can use different methods to obtain the appropriate weather influencing factors kappa and shadow fall-off deltas based on the above teachings and are not further elaborated herein.
By implementing the communication terminal entering area judging method, the communication terminal entering area judging system and the computer storage medium based on the dynamic RSRP threshold, the RSRP threshold can be dynamically adjusted according to weather conditions and geographic conditions of the target base station, so that whether the vehicle-mounted terminal enters a signal overlapping area of the target base station can be accurately judged under various conditions (different weather conditions or different geographic environments of the target base station), and the vehicle-mounted terminal can reliably conduct subsequent communication link switching.
Fig. 2 is a functional block diagram of a preferred embodiment of the communication terminal ingress decision system based on dynamic RSRP threshold of the present invention. As shown in fig. 2, the communication terminal entering area determination system based on dynamic RSRP threshold of the present invention includes a dynamic RSRP threshold adjustment module 100 and a determination module 200. The dynamic RSRP threshold adjustment module 100 is configured to dynamically adjust the set fixed RSRP threshold to a dynamic RSRP threshold according to weather conditions and the geographic environment of the base station. The determining module 200 is configured to monitor an actual RSRP of a target base station during a movement process of the vehicle-mounted terminal, and determine that the vehicle-mounted terminal enters a signal overlapping region with the target base station when the actual RSRP is greater than or equal to the dynamic RSRP threshold.
In a preferred embodiment of the present invention, the dynamic RSRP threshold adjustment module 100 is further configured to: calculating the dynamic RSRP threshold based on weather-influencing factor k, shadow fall-off Δs and the fixed RSRP threshold:
P′＝κP-(κ-1)Pt(x)-ΔS；
wherein P represents the fixed RSRP threshold, P' represents the dynamic RSRP threshold, and Pt (x) represents the transmission power of the vehicle-mounted terminal.
In a preferred embodiment of the present invention, the dynamic RSRP threshold adjustment module is further configured to:
the actual RSRP of the target base station j is denoted as RSRP (x, j) =pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) denotes the path loss of the transmit power when the signal is to the target base station j and S (x, j, σ) denotes the shadow fading of the transmit power when the signal is to the target base station j;
the target base station j under the set weather condition is expressed as an adjustment target base station j ', and the actual adjustment RSRP of the adjustment target base station j ' is expressed as RSRP (x, j ') =pt (x) -PL (x, j ') -S (x, j ', σ '), wherein PL (x, j ') represents the path loss of the transmission power when the signal reaches the adjustment target base station j ', and S (x, j ', σ ') represents the shadow fading of the transmission power when the signal reaches the adjustment target base station j '
Expressing the path loss of the transmission power of the signal to the target base station j ' as PL (x, j ')Σpl (x, j) by using the weather-effect factor κ and the path loss PL (x, j) of the transmission power of the signal to the target base station j ', thereby obtaining RSRP (x, j ')=pt (x) -PL (x, j ') -S (x, j ', σ ')=pt (x) - κpl (x, j ', σ ');
setting the threshold value of the adjustment target base station j 'to the dynamic RSRP threshold value P', thereby obtaining an RSRP decision condition RSRP (x, j ') =pt (x) - κpl (x, j) -S (x, j', σ ') ∈p';
obtaining a transformation formula (one) kPt (x) -kPL (x, j) -kS (x, j, sigma) not less than kP based on RSRP decision conditions Pt (x) -PL (x, j) -S (x, j, sigma) not less than P of the target base station j and the weather influence factor kP;
processing the transformation formula (one) to obtain a transformation formula (two) Pt (x) -kappa PL (x, j) -S (x, j ', σ') ∈p- (kappa-1) Pt (x, j ', σ') ++κs (x, j, σ) =kappa P- (kappa-1) Pt (x) - Δs, Δs=s (x, j ', σ') - κs (x, j, σ);
obtaining the dynamic RSRP threshold based on the transform equation (two): p' =κp- (κ -1) Pt (x) - Δs.
Those skilled in the art will appreciate that the communication terminal entering area determining system based on the dynamic RSRP threshold may be implemented by hardware, software, or a combination of hardware and software based on the preferred embodiments of the communication terminal entering area determining method based on the dynamic RSRP threshold shown in fig. 1. The invention may be implemented in a centralized fashion in at least one computer system or in a distributed fashion where different elements are spread across several interconnected computer systems. Any kind of computer system or other apparatus adapted for carrying out the methods of the invention is suited. The combination of hardware and software may be a general-purpose computer system with a computer program installed thereon, which, when executed, controls the computer system such that it carries out the methods of the present invention.
The invention also relates to a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the method for determining a communication terminal ingress based on a dynamic RSRP threshold. Which comprises all the features enabling the implementation of the methods described herein, and which when installed in a computer system, is able to carry out the methods described herein. The computer program in this document refers to: any expression, in any programming language, code or notation, of a set of instructions intended to cause a system having an information processing capability to perform a particular function either directly or after either or both of the following: a) Conversion to other languages, codes or symbols; b) Reproduced in a different format.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. A method for determining a communication terminal entering a zone based on a dynamic RSRP threshold, comprising the steps of:
s1, dynamically adjusting a set fixed RSRP threshold to be a dynamic RSRP threshold according to weather conditions and the geographic environment of a base station;
s2, monitoring the actual RSRP of a target base station in the moving process of the vehicle-mounted terminal, and judging that the vehicle-mounted terminal enters a signal overlapping area with the target base station when the actual RSRP is greater than or equal to the dynamic RSRP threshold;
the step S1 further includes:
s11, calculating the dynamic RSRP threshold based on weather influence factor kappa, shadow fall-off delta S and the fixed RSRP threshold:
P′＝κP-(κ-1)Pt(x)-ΔS；
wherein P represents the fixed RSRP threshold, P' represents the dynamic RSRP threshold, and Pt (x) represents the transmission power of the vehicle-mounted terminal.
2. The method for determining whether a communication terminal enters a zone based on a dynamic RSRP threshold according to claim 1, wherein said step S11 further comprises:
s111, the actual RSRP of the target base station j is denoted as RSRP (x, j) =pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) represents the path loss of the transmit power when the signal reaches the target base station j, and S (x, j, σ) represents the shadow fading of the transmit power when the signal reaches the target base station j;
s112, representing a target base station j under set weather conditions as an adjustment target base station j ', and representing an actual adjustment RSRP of the adjustment target base station j ' as RSRP (x, j ') =pt (x) -PL (x, j ') -S (x, j ', σ '), wherein PL (x, j ') represents a path loss of transmission power when a signal is transmitted to the adjustment target base station j ', and S (x, j ', σ ') represents a shadow fading of transmission power when a signal is transmitted to the adjustment target base station j ';
s113, expressing the path loss of the transmission power of the signal to the target base station j ' as PL (x, j ') (kappa PL (x, j)) by using the weather influence factor kappa and the path loss PL (x, j) of the transmission power of the signal to the target base station j ', thereby obtaining RSRP (x, j ') (Pt (x) -PL (x, j ') -S (x, j ', sigma ') (Pt (x) -kappa PL (x, j ') and sigma ');
s114, setting the threshold value of the adjustment target base station j 'to the dynamic RSRP threshold value P', thereby obtaining an RSRP decision condition RSRP (x, j ')=pt (x) - κpl (x, j) -S (x, j', σ ')Σp';
s114, obtaining a transformation formula (one) kappa Pt (x) -kappa PL (x, j) -kappa S (x, j, sigma) not less than kappa P based on RSRP judgment conditions Pt (x) -PL (x, j) -S (x, j, sigma) not less than P of the target base station j and the weather influence factor kappa;
s115, processing the transformation formula (I) to obtain a transformation formula (II) Pt (x) -kappa PL (x, j) -S (x, j ', sigma') equal to or greater than kappa P- (kappa-1) Pt (x, j ', sigma') +kappa S (x, j, sigma) =kappa P- (kappa-1) Pt (x) -delta S, delta S=S (x, j ', sigma') -kappa S (x, j, sigma);
s116, obtaining the dynamic RSRP threshold based on the transformation formula (two): p' =κp- (κ -1) Pt (x) - Δs.
3. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements a communication terminal entry decision method based on a dynamic RSRP threshold according to any of the claims 1-2.
4. A communication terminal entry decision system based on a dynamic RSRP threshold, comprising:
the dynamic RSRP threshold adjustment module is used for dynamically adjusting the set fixed RSRP threshold into a dynamic RSRP threshold according to weather conditions and the geographic environment of the base station;
the judging module is used for monitoring the actual RSRP of the target base station in the moving process of the vehicle-mounted terminal, and judging that the vehicle-mounted terminal enters a signal overlapping area with the target base station when the actual RSRP is greater than or equal to the dynamic RSRP threshold value;
the dynamic RSRP threshold adjustment module is further configured to:
calculating the dynamic RSRP threshold based on weather-influencing factor k, shadow fall-off Δs and the fixed RSRP threshold:
P′＝κP-(κ-1)Pt(x)-ΔS；
wherein P represents the fixed RSRP threshold, P' represents the dynamic RSRP threshold, and Pt (x) represents the transmission power of the vehicle-mounted terminal.
5. The dynamic RSRP threshold-based communication terminal entry decision system of claim 4 wherein said dynamic RSRP threshold adjustment module is further configured to:
the actual RSRP of the target base station j is denoted as RSRP (x, j) =pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) denotes the path loss of the transmit power when the signal is to the target base station j and S (x, j, σ) denotes the shadow fading of the transmit power when the signal is to the target base station j;
the method comprises the steps of representing a target base station j under set weather conditions as an adjustment target base station j ', and representing the actual adjustment RSRP of the adjustment target base station j ' as RSRP (x, j ')=Pt (x) -PL (x, j ') -S (x, j ', sigma '), wherein PL (x, j ') represents the path loss of transmission power when a signal reaches the adjustment target base station j ', and S (x, j ', sigma ') represents shadow fading of the transmission power when the signal reaches the adjustment target base station j ';
expressing the path loss of the transmission power of the signal to the target base station j ' as PL (x, j ')Σpl (x, j) by using the weather-effect factor κ and the path loss PL (x, j) of the transmission power of the signal to the target base station j ', thereby obtaining RSRP (x, j ')=pt (x) -PL (x, j ') -S (x, j ', σ ')=pt (x) - κpl (x, j ', σ ');
setting the threshold value of the adjustment target base station j 'to the dynamic RSRP threshold value P', thereby obtaining an RSRP decision condition RSRP (x, j ') =pt (x) - κpl (x, j) -S (x, j', σ ') ∈p';
obtaining a transformation formula (one) kPt (x) -kPL (x, j) -kS (x, j, sigma) not less than kP based on RSRP decision conditions Pt (x) -PL (x, j) -S (x, j, sigma) not less than P of the target base station j and the weather influence factor kP;
processing the transformation formula (one) to obtain a transformation formula (two) Pt (x) -kappa PL (x, j) -S (x, j ', σ') ∈p- (kappa-1) Pt (x, j ', σ') ++κs (x, j, σ) =kappa P- (kappa-1) Pt (x) - Δs, Δs=s (x, j ', σ') - κs (x, j, σ);
obtaining the dynamic RSRP threshold based on the transform equation (two): p' =κp- (κ -1) Pt (x) - Δs.
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