CN114222342A - Method, system and computer storage medium for judging access of communication terminal based on dynamic RSRP threshold - Google Patents
Method, system and computer storage medium for judging access of communication terminal based on dynamic RSRP threshold Download PDFInfo
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Abstract
The invention relates to a communication terminal entering area judging method based on a dynamic RSRP threshold value, which comprises the steps of dynamically adjusting a set fixed RSRP threshold value into a dynamic RSRP threshold value according to weather conditions and the geographic environment of a base station; and in the moving process of the vehicle-mounted terminal, monitoring the actual RSRP of the target base station, 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 invention also relates to a computer readable storage medium and a communication terminal entering area judging system based on the dynamic RSRP threshold value. The method and the device can dynamically adjust the RSRP threshold value according to the weather condition and the geographic condition 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 carry out subsequent communication link switching conveniently.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method, a system, and a computer storage medium for determining an entry of a communication terminal 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. The current high-speed rail communication adopts 5G millimeter wave technology, but the millimeter wave antenna coverage distance is usually less than 10 kilometers, so that the vehicle-mounted terminal is required to perform handover between base stations. When communication link switching is carried out, after the fact that the vehicle-mounted terminal enters a signal overlapping area needs to be judged, switching is carried out according to a switching algorithm. Currently, it is usually determined whether the terminal enters a Signal overlapping region between a current base station and a target base station by using a Reference Signal Received Power (RSRP) threshold set by the target base station.
However, the prior art has the disadvantage that the RSRP threshold of each base station is usually a fixed value which is uniformly set, but during the running of the vehicle, the communication condition between the vehicle-mounted terminal and the target base station is affected by the weather condition and the geographical environment of the base station, and under different weather conditions and the condition that the vehicle-mounted terminal needs to communicate with the target base station in different geographical environments, the use of the fixed and unchanged RSRP threshold may cause the situation that the vehicle-mounted terminal does not enter the signal overlapping area and thus erroneously judges the signal overlapping area too early, and erroneously judges the signal overlapping area too late and then the vehicle-mounted terminal has moved out of the signal overlapping area, which all affect the switching of the communication link.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method, a system, and a computer storage medium for judging the entering of a communication terminal based on a dynamic RSRP threshold, which can dynamically adjust the RSRP threshold according to weather conditions and geographical conditions of a target base station, so as to accurately judge whether a vehicle-mounted terminal enters a signal overlapping area of the target base station under various conditions, thereby facilitating the vehicle-mounted terminal to reliably perform subsequent communication link switching.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for judging the entering of a communication terminal based on a dynamic RSRP threshold value is constructed, and comprises the following steps:
s1, dynamically adjusting the set fixed RSRP threshold value into a dynamic RSRP threshold value according to weather conditions and the geographic environment of the base station;
s2, in the moving process of the vehicle-mounted terminal, monitoring the actual RSRP of the target base station, 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 an entry of a communication terminal based on a dynamic RSRP threshold according to the present invention, the step S1 further includes:
s11, calculating the dynamic RSRP threshold value based on the weather influence factor kappa, the shadow attenuation delta S and the fixed RSRP threshold value:
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 in-vehicle terminal.
In the method for determining an entry of a communication terminal based on a dynamic RSRP threshold according to the present invention, the step S11 further includes:
s111, representing an actual RSRP of the target base station j as RSRP (x, j) ═ pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) represents a path loss of a transmission power from the signal to the target base station j, and S (x, j, σ) represents a shadow fading of the transmission power from the signal to the target base station j;
s112, representing a target base station j under a set weather condition 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 '), where PL (x, j ') represents a path loss of a transmission power from a signal to the adjustment target base station j ', and S (x, j ', σ ') represents a shadow fading of the transmission power from the signal 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') ≈ kppl (x, j ') by using the weather influence factor κ and the path loss PL (x, j) of the transmission power of the signal to the target base station j', and further obtaining RSRP (x, j ') ═ pt (x), (x) -PL (x, j') -S (x, j ', σ') ═ pt (x) -kpl (x, j) -S (x, j ', σ');
s114, setting the threshold of the adjustment target base station j ' as the dynamic RSRP threshold P ', so as to obtain an RSRP determination condition RSRP (x, j ') -pt (x) - κ PL (x, j) -S (x, j ', σ ') > or ≧ P ' of the adjustment target base station j ';
s114, obtaining a conversion expression (I) kappa Pt (x) -kappa PL (x, j) -kappa S (x, j, sigma) being not less than kappa P based on the RSRP judging condition 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 (one) to obtain a transformation (two) pt (x) - κ PL (x, j) -S (x, j ', σ') > κ P- (κ -1) pt (x) -S (x, j ', σ') + κ S (x, j, σ) ═ κ P- (κ -1) pt (x) - Δ S, Δ S ═ S (x, j ', σ') - κ S (x, j, σ);
s116, obtaining the dynamic RSRP threshold value based on the transformation formula (II): p' ═ κ P- (κ -1) pt (x) - Δ S.
Another technical solution adopted to solve the technical problem of the present invention is to configure a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the method for determining an entry of a communication terminal based on a dynamic RSRP threshold.
Another technical solution adopted by the present invention to solve the technical problem is to construct a system for determining an entry of a communication terminal based on a dynamic RSRP threshold, including:
the dynamic RSRP threshold adjusting 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 system for determining an entry of a communication terminal based on a dynamic RSRP threshold according to the present invention, the dynamic RSRP threshold adjustment module is further configured to:
calculating the dynamic RSRP threshold based on a weather effect factor κ, a shadow attenuation Δ 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 in-vehicle terminal.
In the system for determining an entry of a communication terminal based on a dynamic RSRP threshold according to the present invention, the dynamic RSRP threshold adjustment module is further configured to:
representing the actual RSRP of the target base station j as RSRP (x, j) ═ pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) represents the path loss of the transmission power of the signal to the target base station j, and S (x, j, σ) represents the shadow fading of the transmission power of the signal to the target base station j;
representing a target base station j under a set weather condition as an adjustment target base station j ', and representing an actual adjustment RSRP of the adjustment target base station j ' as an RSRP (x, j ') -Pt (x) -PL (x, j ') -S (x, j ', sigma '), wherein PL (x, j ') represents a path loss of transmission power of a signal to the adjustment target base station j ', and S (x, j ', sigma ') represents a shadow fading of the transmission power of the signal to 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 ') ≈ k PL (x, j) by adopting 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 ', and further obtaining RSRP (x, j ') -PL (x, j ') -S (x, j ', sigma ') -Pt (x) -kappa PL (x, j) -S (x, j ', sigma ');
setting the threshold of the adjustment target base station j ' as the dynamic RSRP threshold value P ', thereby obtaining the RSRP judging condition RSRP (x, j ') -Pt (x) -kappa PL (x, j) -S (x, j ', sigma ') > or more P ' of the adjustment target base station j ';
obtaining a transformation expression (one) kappa Pt (x) -kappa PL (x, j) -kappa S (x, j, sigma) gtoreqkappa P based on the RSRP judgment condition Pt (x) PL (x, j) -S (x, j, sigma) gtoreqP of the target base station j and the weather influence factor kappa;
processing the transform (one) to obtain a transform (di) pt (x) (k) kappal (x, j) -S (x, j ', σ') > κ P- (κ -1) pt (x) -S (x, j ', σ') + κ S (x, j, σ) ═ κ P- (κ -1) pt (x) - Δ S, Δ S ═ S (x, j ', σ') - κ S (x, j, σ);
obtaining the dynamic RSRP threshold based on the transformation (two): p' ═ κ P- (κ -1) pt (x) - Δ S.
By implementing the method, the system and the computer storage medium for judging the entering of the communication terminal based on the dynamic RSRP threshold, the RSRP threshold can be dynamically adjusted according to the weather condition and the geographic condition 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 carry out subsequent communication link switching.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a flowchart of a preferred embodiment of a communication terminal inbound decision method based on dynamic RSRP threshold of the present invention;
fig. 2 is a schematic block diagram of a preferred embodiment of the dynamic RSRP threshold based communication terminal inbound decision system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention relates to a communication terminal entering area judging method based on a dynamic RSRP threshold value, which comprises the steps of dynamically adjusting a set fixed RSRP threshold value into a dynamic RSRP threshold value according to weather conditions and the geographic environment of a base station; and in the moving process of the vehicle-mounted terminal, monitoring the actual RSRP of the target base station, 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. By implementing the method for judging the entering of the communication terminal based on the dynamic RSRP threshold, the RSRP threshold can be dynamically regulated according to the weather condition and the geographic condition 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 carry out subsequent communication link switching conveniently.
Fig. 1 is a flowchart of a preferred embodiment of the method for determining the incoming area of a communication terminal based on a dynamic RSRP threshold according to 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 geographical environment of the base station. In a preferred embodiment of the invention, the dynamic RSRP threshold is calculated based on a weather effect factor κ, a shadow attenuation Δ 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 in-vehicle terminal.
In step S2, during the movement of the vehicle-mounted terminal, the actual RSRP of the target base station is monitored, and when the actual RSRP is greater than or equal to the dynamic RSRP threshold, it is determined that the vehicle-mounted terminal enters a signal overlapping area with the target base station.
In particular, in a further preferred embodiment of the invention, the specific calculation and derivation of said dynamic RSRP threshold P' is explained below.
And setting the uniform RSRP threshold of each base station as P, and when the RSRP judgment condition of the target base station j is that the RSRP (x, j) is more than or equal to P, the vehicle-mounted terminal x enters a signal overlapping area of the current base station and the target base station j. Therefore, the actual RSRP (x, j) of the target base station may be represented as RSRP (x, j) ═ pt (x) -PL (x, j) -S (x, j, σ), pt (x) represents the transmission power of the vehicle-mounted terminal, PL (x, j) represents the path loss of the transmission power when the signal reaches the target base station j, and S (x, j, σ) represents the shadow fading of the transmission power when the signal reaches the target base station j. That is, it can be determined that the in-vehicle terminal enters the signal overlapping area of the target base station j when Pt (x) -PL (x, j) -S (x, j, σ) ≧ P.
The signal transmission power is more attenuated due to weather conditions that affect the attenuation of the signal transmission power, such as severe weather. At this time, a target base station j under a set weather condition is represented as an adjustment target base station j ', and an actual adjustment RSRP of the adjustment target base station j ' is represented as RSRP (x, j ') -pt (x) -PL (x, j ') -S (x, j ', σ '), where pt (x) represents transmission power of the vehicle-mounted terminal, PL (x, j ') represents path loss of transmission power when a signal reaches the adjustment target base station j ', and S (x, j ', σ ') represents shadow fading of transmission power of the signal at the adjustment target base station j '.
Since the base stations and the signal overlapping areas are usually arranged equidistantly, and the path loss of the vehicle-mounted terminal from different overlapping areas to different target base stations is basically the same under the condition of unchanged weather, under the set weather condition (for example, the severe weather condition), the path loss of the transmission power of the signal to the adjustment target base station j ' will be affected by the weather influence factor κ, at this time, the weather influence factor κ and the path loss PL (x, j) of the transmission power of the signal to the adjustment target base station j ' can be adopted to express that the path loss of the transmission power of the signal to the adjustment target base station j ' is PL (x, j ') ≈ kpl (x, j), and the shadow fading loss is mainly affected by the geographical environment where the base station is located, and the weather influence is not great, at this time, the actual adjustment RSRP of the adjustment target base station j ' can be expressed as RSRP (x, j ') -pt (x), (j ') -PL (x, j ') -S (x, j ', σ ') -pt (x) - κ PL (x, j) -S (x, j ', σ ').
Setting the threshold of the adjustment target base station j 'as the dynamic RSRP threshold P', so as to obtain an RSRP decision condition RSRP (x, j ') -pt (x) - κ PL (x, j) -S (x, j', σ ') > or ≧ P'; namely Pt (x) -kappa PL (x, j) -S (x, j ', sigma'). gtoreq.P ', it can be determined that the in-vehicle terminal enters a signal overlapping area with the target base station P'. At this time, the dynamic RSRP threshold P' may be stacked using a mathematical transformation.
First, a conversion equation (I) is obtained based on the RSRP determination condition Pt (x) -PL (x, j) -S (x, j, σ) ≧ P of the target base station j and the weather influence factor κ
κPt(x)-κPL(x,j)-κS(x,j,σ)≥κP。
Adding the following formulas to both sides of the transformation formula (one):
P-(κ-1)Pt(x)-S(x,j′,σ′)+κS(x,j,σ)；
the sign of the transform (one) does not change, and the transform (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 (III), transformation (II) can be obtained
Pt (x) - κ PL (x, j) -S (x, j ', σ') > κ P- (κ -1) pt (x) -S (x, j ', σ') + κ S (x, j, σ) ═ κ P- (κ -1) pt (x) - Δ S, Δ S ═ S (x, j ', σ') - κ S (x, j, σ), and Δ S is a shadow attenuation difference.
That is, it can be obtained by the transformation equation (two), when the RSRP (x, j '). gtoreq.kappa.p- (kappa-1) pt (x) - Δ S is determined to be under the set weather condition (e.g. bad weather), and the in-vehicle terminal enters the signal overlapping area of the target base station j', then the dynamic RSRP threshold value is considered to be under the set weather condition (e.g. bad weather): p' ═ κ P- (κ -1) pt (x) - Δ S.
It should be noted that, in a preferred embodiment of the present invention, the weather influence factor κ and the shadow attenuation Δ S may be obtained empirically, for example, by performing statistical analysis on the RSRP threshold in normal weather and the experimentally measured RSRP threshold adjusted by each base station in various severe weather.
Further, in another preferred embodiment of the present invention, RSRP threshold data and weather factor data (wind, rainfall, temperature, lightning, etc.) in normal weather can be used as inputs, and the experimentally measured RRSRP threshold, weather influence factor κ and shadow attenuation difference Δ S of each base station in various severe weather are used as comparison outputs to train the neural network, so as to obtain a neural network model capable of predicting the weather influence factor κ, the shadow attenuation difference Δ S and the adjusted RSRP threshold, and the RSRP threshold can be dynamically adjusted directly by the neural network model in subsequent severe weather.
The person skilled in the art can, based on the above teachings, use different methods to obtain the suitable weather-affecting factor κ and shadow attenuation Δ S, which are not described here in more detail.
By implementing the method, the system and the computer storage medium for judging the entering of the communication terminal based on the dynamic RSRP threshold, the RSRP threshold can be dynamically adjusted according to the weather condition and the geographic condition 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 (different weather conditions or different geographic environments of the target base station), and the vehicle-mounted terminal can reliably carry out subsequent communication link switching conveniently.
Fig. 2 is a schematic block diagram of a preferred embodiment of the dynamic RSRP threshold based communication terminal inbound decision system of the present invention. As shown in fig. 2, the system for determining entry of a communication terminal based on dynamic RSRP threshold according to 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 a weather condition and a geographical environment of the base station. The determining module 200 is configured to monitor an actual RSRP of a target base station during a moving process of the vehicle-mounted terminal, and determine 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.
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 a weather effect factor κ, a shadow attenuation Δ 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 in-vehicle terminal.
In a preferred embodiment of the present invention, the dynamic RSRP threshold adjustment module is further configured to:
representing the actual RSRP of the target base station j as RSRP (x, j) ═ pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) represents the path loss of the transmission power of the signal to the target base station j, and S (x, j, σ) represents the shadow fading of the transmission power of the signal to the target base station j;
a target base station j under a set weather condition is represented as an adjustment target base station j ', and an actual adjustment RSRP of the adjustment target base station j' is represented as RSRP (x, j ') -pt (x) -PL (x, j') -S (x, j ', σ'), where PL (x, j ') represents a path loss of transmission power of a signal to the adjustment target base station j', and S (x, j ', σ') represents a shadow fading of transmission power of the signal to 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 ') ≈ k PL (x, j) by adopting 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 ', and further obtaining RSRP (x, j ') -PL (x, j ') -S (x, j ', sigma ') -Pt (x) -kappa PL (x, j) -S (x, j ', sigma ');
setting the threshold of the adjustment target base station j ' as the dynamic RSRP threshold value P ', thereby obtaining the RSRP judging condition RSRP (x, j ') -Pt (x) -kappa PL (x, j) -S (x, j ', sigma ') > or more P ' of the adjustment target base station j ';
obtaining a transformation expression (one) kappa Pt (x) -kappa PL (x, j) -kappa S (x, j, sigma) gtoreqkappa P based on the RSRP judgment condition Pt (x) PL (x, j) -S (x, j, sigma) gtoreqP of the target base station j and the weather influence factor kappa;
processing the transform (one) to obtain a transform (di) pt (x) (k) kappal (x, j) -S (x, j ', σ') > κ P- (κ -1) pt (x) -S (x, j ', σ') + κ S (x, j, σ) ═ κ P- (κ -1) pt (x) - Δ S, Δ S ═ S (x, j ', σ') - κ S (x, j, σ);
obtaining the dynamic RSRP threshold based on the transformation (two): p' ═ κ P- (κ -1) pt (x) - Δ S.
As will be understood by those skilled in the art, the system for determining the entry of a communication terminal based on the dynamic RSRP threshold may be implemented by hardware, software, or a combination of software and hardware based on the various preferred embodiments of the method for determining the entry of a communication terminal based on the dynamic RSRP threshold shown in fig. 1. The present invention can be realized 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 present invention is suited. A typical combination of hardware and software could be a general purpose computer system with a computer program that, when being loaded and executed, controls the computer system such that it carries out the methods described herein.
The invention also relates to a computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, carries out the method for determining the entry of a communication terminal based on a dynamic RSRP threshold. The computer comprises all the features enabling the implementation of the method according to the invention when it is installed in a computer system. 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 above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A method for judging the entering of a communication terminal based on a dynamic RSRP threshold value is characterized by comprising the following steps:
s1, dynamically adjusting the set fixed RSRP threshold value into a dynamic RSRP threshold value according to weather conditions and the geographic environment of the base station;
s2, in the moving process of the vehicle-mounted terminal, monitoring the actual RSRP of the target base station, 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.
2. The method for determining the admission of a communication terminal according to claim 1, wherein said step S1 further comprises:
s11, calculating the dynamic RSRP threshold value based on the weather influence factor kappa, the shadow attenuation delta S and the fixed RSRP threshold value:
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 in-vehicle terminal.
3. The method for determining the admission of a communication terminal according to claim 2, wherein said step S11 further comprises:
s111, representing an actual RSRP of the target base station j as RSRP (x, j) ═ pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) represents a path loss of a transmission power from the signal to the target base station j, and S (x, j, σ) represents a shadow fading of the transmission power from the signal to the target base station j;
s112, representing a target base station j under a set weather condition 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 '), where PL (x, j ') represents a path loss of a transmission power from a signal to the adjustment target base station j ', and S (x, j ', σ ') represents a shadow fading of the transmission power from the signal 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') ≈ kppl (x, j ') by using the weather influence factor κ and the path loss PL (x, j) of the transmission power of the signal to the target base station j', and further obtaining RSRP (x, j ') ═ pt (x), (x) -PL (x, j') -S (x, j ', σ') ═ pt (x) -kpl (x, j) -S (x, j ', σ');
s114, setting the threshold of the adjustment target base station j ' as the dynamic RSRP threshold P ', so as to obtain an RSRP determination condition RSRP (x, j ') -pt (x) - κ PL (x, j) -S (x, j ', σ ') > or ≧ P ' of the adjustment target base station j ';
s114, obtaining a conversion expression (I) kappa Pt (x) -kappa PL (x, j) -kappa S (x, j, sigma) being not less than kappa P based on the RSRP judging condition 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 (one) to obtain a transformation (two) pt (x) - κ PL (x, j) -S (x, j ', σ') > κ P- (κ -1) pt (x) -S (x, j ', σ') + κ S (x, j, σ) ═ κ P- (κ -1) pt (x) - Δ S, Δ S ═ S (x, j ', σ') - κ S (x, j, σ);
s116, obtaining the dynamic RSRP threshold value based on the transformation formula (II): p' ═ κ P- (κ -1) pt (x) - Δ S.
4. A computer readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements a method for dynamic RSRP threshold based communication terminal entry decision making according to any of claims 1-3.
5. A system for judging the entering of a communication terminal based on a dynamic RSRP threshold value is characterized by comprising the following steps:
the dynamic RSRP threshold adjusting 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.
6. The dynamic RSRP threshold based communication terminal admission decision system of claim 5, wherein the dynamic RSRP threshold adjustment module is further configured to:
calculating the dynamic RSRP threshold based on a weather effect factor κ, a shadow attenuation Δ 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 in-vehicle terminal.
7. The dynamic RSRP threshold based communication terminal admission decision system of claim 6, wherein the dynamic RSRP threshold adjustment module is further configured to:
representing the actual RSRP of the target base station j as RSRP (x, j) ═ pt (x) -PL (x, j) -S (x, j, σ), where PL (x, j) represents the path loss of the transmission power of the signal to the target base station j, and S (x, j, σ) represents the shadow fading of the transmission power of the signal to the target base station j;
representing a target base station j under a set weather condition as an adjustment target base station j ', and representing an actual adjustment RSRP of the adjustment target base station j ' as an RSRP (x, j ') -Pt (x) -PL (x, j ') -S (x, j ', sigma '), wherein PL (x, j ') represents a path loss of transmission power of a signal to the adjustment target base station j ', and S (x, j ', sigma ') represents a shadow fading of the transmission power of the signal to 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 ') ≈ k PL (x, j) by adopting 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 ', and further obtaining RSRP (x, j ') -PL (x, j ') -S (x, j ', sigma ') -Pt (x) -kappa PL (x, j) -S (x, j ', sigma ');
setting the threshold of the adjustment target base station j ' as the dynamic RSRP threshold value P ', thereby obtaining the RSRP judging condition RSRP (x, j ') -Pt (x) -kappa PL (x, j) -S (x, j ', sigma ') > or more P ' of the adjustment target base station j ';
obtaining a transformation expression (one) kappa Pt (x) -kappa PL (x, j) -kappa S (x, j, sigma) gtoreqkappa P based on the RSRP judgment condition Pt (x) PL (x, j) -S (x, j, sigma) gtoreqP of the target base station j and the weather influence factor kappa;
processing the transform (one) to obtain a transform (di) pt (x) (k) kappal (x, j) -S (x, j ', σ') > κ P- (κ -1) pt (x) -S (x, j ', σ') + κ S (x, j, σ) ═ κ P- (κ -1) pt (x) - Δ S, Δ S ═ S (x, j ', σ') - κ S (x, j, σ);
obtaining the dynamic RSRP threshold based on the transformation (two): p' ═ κ P- (κ -1) pt (x) - Δ S.
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