WO2017133636A1 - Method and apparatus for predicting base station switching of a mobile terminal - Google Patents

Abstract

A method and apparatus for predicting base station switching of a mobile terminal. The method comprises: acquiring a localization position of a mobile terminal via an acquisition module and recording moving track data formed by the localization position; obtaining, according to the recorded moving track data, a moving direction of the mobile terminal; a computation module respectively computing the similarity between the moving direction of the mobile terminal and a link direction of the mobile terminal and each base station in an area; and when the obtained similarity satisfies a predetermined condition, a prediction module determining a base station in a link direction corresponding to the similarity that satisfies the predetermined condition to be a pre-switching base station. The above-mentioned technical solution can prepare resources for a user in advance, avoiding a conversion delay of serving base stations, and thereby ensuring the effective and stable service quality for a user.

Description

Method and device for predicting mobile terminal switching base station Technical field

This document relates to, but is not limited to, the field of wireless communication technologies, and relates to a method and apparatus for predicting a handover of a base station by a mobile terminal.

Background technique

At present, with the popularization of various intelligent terminals and the explosive growth of wireless data services in the future, in some hotspots, such as cinemas, shopping malls, exhibition halls, etc., there are often a large number of business needs in these mobile hotspots. Introduce Small Cell deployment to increase the capacity of the entire network, which is now Ultra-Dense Networks (UDN).

In the related art, in a user-level cell of an ultra-dense network, the number of users is basically equal to the number of stations, and the station may be a small station or a hotspot (Hotspot). Due to the randomness of the distribution of Small cell/Hotspot stations, most user mobility predictions The scheme mainly considers the mobile prediction method based on user movement history, based on Markov chain, based on user direction/signal strength, and predicts the site that the user accesses in the future according to the user's historical motion parameters, transition probability matrix, and received signal strength.

However, the adoption of related technologies is usually carried out under the condition that the station is stationary, and the site facing the mobility in the ultra-dense network scenario leads to high computational complexity and is not conducive to engineering implementation. Therefore, how to achieve ultra-dense The prediction of the behavior track of the mobile terminal by the user in the network scenario is to solve the problem that the user prepares resources in advance, avoids the delay of the service site conversion, and guarantees the user's efficient and stable service quality.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiments of the present invention provide a method and a device for predicting a mobile terminal handover base station, which can predict a mobile trajectory of the mobile terminal, and determine a base station that can perform handover in the area, so that the user can prepare resources in advance and avoid the conversion delay of the serving base station. In order to ensure the user's efficient and stable service quality.

An embodiment of the present invention provides a method for predicting a mobile terminal to switch a base station, where the method includes:

Obtaining a positioning position of the mobile terminal, recording the movement trajectory data formed by the positioning position, and obtaining a moving direction of the mobile terminal according to the recorded movement trajectory data;

Calculating, respectively, a similarity between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area;

When the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity satisfying the predetermined condition is determined as the pre-handover base station.

Optionally, calculating the similarity between the moving direction of the mobile terminal and the connection direction of each mobile station and each base station in the area, including:

Calculating, respectively, an angle between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area, and separately calculating a first time that the mobile terminal can switch to each base station in the area Access probability.

Optionally, when the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition is determined as the pre-handover base station, and includes:

When the obtained first access probability is greater than the predetermined threshold, the base station in the connection direction corresponding to the first access probability is determined as a pre-handover base station.

Optionally, after calculating the similarity between the moving direction of the mobile terminal and the connection direction of each mobile station in the mobile terminal and the area, the method further includes:

Obtaining a distance from the mobile terminal to each base station in the area, and obtaining, according to the acquired distance, a second access probability that the mobile terminal can switch to each base station in the area;

Obtaining, according to the first access probability and the second access probability, a third access probability that the mobile terminal can switch to each base station in the area.

Optionally, when the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition is determined as the pre-handover base station, and includes:

When the third access probability is greater than the predetermined threshold, the base station in the connection direction corresponding to the third access probability is determined as a pre-handover base station.

Optionally, after calculating an angle between a moving direction of the mobile terminal and a connection direction of each of the mobile terminal and each base station in the area, the method further includes:

If a plurality of equal angles are obtained, the distances of the mobile terminals to the base stations in the area corresponding to the equal angles are respectively acquired.

Optionally, when the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition is determined as the pre-handover base station, and includes:

When the acquired distance is less than the predetermined threshold, the base station in the connection direction corresponding to the distance is determined as a pre-handover base station.

Optionally, the method further includes:

A threshold value of the number of base stations that the mobile terminal can pre-switch is determined according to the density of the base stations in the area.

An embodiment of the present invention further provides an apparatus for predicting a handover of a base station by a mobile terminal, where the apparatus includes: an acquisition module, a calculation module, and a prediction module;

The acquiring module is configured to acquire a positioning position of the mobile terminal, record the movement trajectory data formed by the positioning position, and obtain a moving direction of the mobile terminal according to the recorded movement trajectory data;

The calculating module is configured to separately calculate a similarity between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area;

The prediction module is configured to determine, when the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition as the pre-handover base station.

Optionally, the calculating module is configured to calculate, respectively, a similarity between a moving direction of the mobile terminal and a connection direction of each mobile station in the mobile terminal and the area:

Calculating, respectively, an angle between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area, and separately calculating a first time that the mobile terminal can switch to each base station in the area Access probability.

Optionally, the predicting module determines, by using the following manner, that the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition is determined as the pre-handover base station when the obtained similarity satisfies the predetermined condition:

When the obtained first access probability is greater than the predetermined threshold, the first access probability is The base station in the direction of the connection should be determined as a pre-switched base station.

Optionally, the computing module is further configured to:

Obtaining a distance from the mobile terminal to each base station in the area, and obtaining, according to the acquired distance, a second access probability that the mobile terminal can switch to each base station in the area;

Obtaining, according to the first access probability and the second access probability, a third access probability that the mobile terminal can switch to each base station in the area.

Optionally, the predicting module determines, by using the following manner, that the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition is determined as the pre-handover base station when the obtained similarity satisfies the predetermined condition:

When the obtained third access probability is greater than the predetermined threshold, the base station in the connection direction corresponding to the third access probability is determined as the pre-handover base station.

Optionally, the computing module is further configured to:

If a plurality of equal angles are obtained, the distances of the mobile terminals to the base stations in the area corresponding to the equal angles are respectively acquired.

Optionally, the predicting module determines, by using the following manner, that the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition is determined as the pre-handover base station when the obtained similarity satisfies the predetermined condition:

When the acquired distance is less than the predetermined threshold, the base station in the connection direction corresponding to the distance is determined as a pre-handover base station.

Optionally, the device further includes: a threshold module;

The threshold module is configured to determine a threshold value of the number of base stations that the mobile terminal can pre-switch according to the density of the base stations in the area.

The embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and when the computer executable instructions are executed, a method for predicting a mobile terminal to switch base stations is implemented.

The method and device for predicting a mobile terminal to switch a base station according to an embodiment of the present invention include: an obtaining module, a calculating module, and a prediction determining module, acquiring an positioning position of the mobile terminal by the acquiring module, and recording moving track data formed by the positioning position Obtaining a moving direction of the mobile terminal according to the recorded movement trajectory data, and the calculating module separately calculates a moving direction of the mobile terminal a similarity between the connection direction of the mobile terminal and each base station in the area, and the prediction module determines, when the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity satisfying the predetermined condition as the pre-determination Switch the base station. The foregoing technical solution can prepare resources for the user in advance, avoiding the conversion delay of the serving base station, thereby ensuring efficient and stable service quality of the user.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

DRAWINGS

The drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the present application, which together with the embodiments of the present application are used to explain the technical solutions of the present application, and do not constitute a limitation of the technical solutions of the present application.

1 is a schematic flowchart of a method for predicting a handover of a base station by a mobile terminal according to Embodiment 1 of the present invention;

2 is a schematic diagram of a mobile direction of a method for predicting a handover of a base station by a mobile terminal according to Embodiment 1 of the present invention;

3 is a schematic diagram of an angle of a method for predicting a handover of a base station by a mobile terminal according to Embodiment 1 of the present invention;

4 is a schematic diagram of a distance for predicting a method for a mobile terminal to switch a base station according to Embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of an application scenario of a method for predicting a handover of a base station by a mobile terminal according to Embodiment 1 of the present invention;

FIG. 6 is a schematic diagram of simulation of a method for predicting handover of a base station by a mobile terminal according to Embodiment 1 of the present invention; FIG.

FIG. 7 is a schematic structural diagram of an apparatus for predicting handover of a base station by a mobile terminal according to Embodiment 2 of the present invention.

detailed description

Embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps shown in the flowchart of the figures may be in a computer such as a set of computer executable instructions Executed in the system. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

The method according to the embodiment of the present invention can be applied to an ultra-dense heterogeneous network, which can be based on a fifth-generation mobile communication system (5G), that is, a plurality of new wireless access technologies and existing wireless access technologies. A general term for solutions after evolution integration.

The data processing center according to the embodiment of the present invention may be a management platform for a mobile terminal to access a base station in an ultra-dense heterogeneous network, and may be a macro station, but is not limited thereto.

The mobile terminal according to the embodiment of the present invention may be an intelligent terminal that requires a wireless access technology, such as a smart phone, a tablet computer, a handheld computer, a computer, a server, etc., but is not limited thereto.

The base station according to the embodiment of the present invention may be a home base station that satisfies a home application, an enterprise/indoor base station that satisfies a small or retail enterprise application, and an outdoor base station that satisfies a public place application.

The method according to the embodiment of the present invention solves the problem of the mobility in the ultra-dense heterogeneous network in the related art, how to predict the mobile trajectory of the mobile terminal in the ultra-dense network scenario, thereby realizing preparation for the user in advance Resources, to avoid service station conversion delay, to ensure efficient and stable service quality.

The technical solutions of the present application are described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes will not be described again.

Embodiment 1

FIG. 1 is a flowchart of a method for predicting a mobile terminal to switch a base station according to Embodiment 1 of the present invention. As shown in FIG. 1 , the method includes:

Step S101: Acquire a positioning position of the mobile terminal, record the movement trajectory data formed by the positioning position, and obtain a moving direction of the mobile terminal according to the recorded movement trajectory data;

In this embodiment, under the ultra-dense network architecture, the data processing center acquires the location of the mobile terminal, and when the mobile terminal is monitored to reach a preset edge area of the base station serving the mobile terminal, it needs to switch the new location. The base station serves the mobile terminal. The range of the edge region can be set according to the actual situation, and the movement trajectory data formed by the positioning position of the mobile terminal is recorded, and the movement trajectory data of the mobile terminal used in the daily user walk is analyzed. Under normal circumstances, because the user walks with a certain directionality and purpose, the mobile terminal is in use. The probability of a large change in the direction of movement during the process of moving away is relatively small. Therefore, a function can be used to represent the internal relationship between the moving track points, and the position of the mobile terminal can be monitored and recorded in several different positions. The corresponding observation coordinate values obtained by Lagrangian interpolation method can give a polynomial function that just passes through several known points on the two-dimensional plane. The polynomial function expression (1) can be as follows:

Where K is a coefficient, K is a positive integer greater than or equal to 1, (x ₀ , y ₀ )...(x _n , y _n ) is the coordinate point of n+1 positions of the mobile terminal, and the simplified polynomial The function expression (2) is as follows:

f(x)=K ₀ +K ₁ x+K ₂ x ² +...+K _n x ⁿ (2)

2 is a schematic diagram of a mobile direction calculation for predicting a method for a mobile terminal to switch base stations according to an embodiment of the present invention, as shown in FIG. 2, where a curve represents a obtained movement trajectory of the mobile terminal, when the mobile terminal is at time t The position of the positioning is (x _t , y _t ), and then the error between the prediction polynomial obtained by Lagrangian interpolation and the actual polynomial, and the calculation expression (3) is as follows:

Where ξ={a,b}, a=min{x ₀ ,x ₁ ,...,x _n },b=max{x ₀ ,x ₁ ,...,x _n }.

By deriving the expression (2) and substituting the current position coordinate into the obtained derivative function, the slope of the current position of the mobile terminal can be calculated, and the tangent of the current position of the mobile terminal can be further obtained, that is, FIG. 2 The straight line with the direction of the arrow is the direction of movement of the mobile terminal, but is not limited thereto.

Step S102, respectively calculating a similarity between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area;

In this embodiment, the positioning position of the mobile terminal may be a center of the circle according to a predetermined diameter. a circular area of the area, the base station in the area of the circular area is used as a range for predicting the handover of the base station, and the location of each base station in the area is obtained, and the location of the mobile terminal is located with each base station in the area. The positions are separately connected, and the similarity between the moving direction of the mobile terminal and the positioning position of the mobile terminal and the position of each base station in the area is calculated respectively. Here, judging by the similarity means that when the connection direction coincides with the moving direction, the base station is considered to predict the base station as a pre-handover base station in the moving direction of the mobile terminal.

S103. When the obtained similarity satisfies a predetermined condition, the base station in the connection direction corresponding to the similarity satisfying the predetermined condition is determined as the pre-handover base station.

In this embodiment, it can be considered that the higher the similarity, the easier it is to switch. The higher the similarity, the more consistent the direction of the connection with the direction of movement, that is, the base station in the connection direction is easier to switch in the direction of movement of the mobile terminal. The threshold of the similarity may be set according to the actual situation. If the similarity satisfies the predetermined condition, the handover may be easily performed. The similarity may be represented by an access probability, a distance, and the like, but is not limited thereto.

An embodiment of the present invention provides a method for predicting a mobile terminal to switch a base station. The method obtains a location of a mobile terminal and records the formed movement trajectory data, and obtains a moving direction of the mobile terminal according to the recorded movement trajectory data, and separately calculates a similarity between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area, and when the obtained similarity satisfies a predetermined condition, the similarity degree of the predetermined condition is met in a connection direction The base station is determined to be a pre-switched base station, so that the user can prepare resources in advance, avoiding the conversion delay of the serving base station, thereby ensuring efficient and stable service quality of the user.

Optionally, on the basis of the foregoing embodiment, calculating, in the foregoing step 102, the similarity between the moving direction of the mobile terminal and the connection direction of each mobile station and each base station in the area, including:

Calculating an angle between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area, and respectively calculating a first connection that the mobile terminal can switch to each base station in the area Entry probability.

FIG. 3 is a schematic diagram of calculating an angle of a method for predicting a mobile terminal to switch a base station according to an embodiment of the present invention. As shown in FIG. 3, where an O point represents a point in a moving direction of the mobile terminal, a positioning position of the mobile terminal is used. , base station TP1 (Transmission Point, transmission point) and O point Formed a triangle. Therefore, the calculation expression (4) for calculating the angle between the moving direction of the mobile terminal and the connection direction of the mobile terminal and the base station TP1 in the area may be as follows:

The distance from the location of the base station TP1 to the location of the mobile terminal is d ₁ , the distance from the location of the mobile terminal to the point O is l ₁ , and the distance from the point O to the base station TP1 is l ₂ , and d ₁ , l ₁ , and l ₂ are both Can be obtained from actual measurements.

Then, according to the angle between the moving direction of the mobile terminal and each base station in the area, the first access probability of the corresponding base station is calculated by the weighting method, and the normalization requirement of the probability calculation is satisfied, and the calculation expression (5) can be as follows:

Where N is the number of base stations in the area, and θ ₁ ... θ _N is the angle between the moving direction of the mobile terminal and the connection direction of the mobile terminal and each base station in the area, P _i is the first access probability of the i-th base station in the area, and θ _i is the angle between the moving direction of the mobile terminal and the connection direction of the mobile terminal and the i-th base station in the area .

Optionally, on the basis of the foregoing embodiment, when the obtained similarity satisfies the predetermined condition, determining, by the base station in the connection direction corresponding to the similarity that meets the predetermined condition, the base station in the connection direction, includes:

When the obtained first access probability is greater than the predetermined threshold, the base station in the connection direction corresponding to the first access probability is determined as the pre-handover base station.

In this embodiment, when the first access probability is greater than the predetermined threshold, the first access probability is larger, and the first access probability corresponding to the base station in the connection direction is more suitable as the pre-handover base station. For example, if the predetermined threshold is 50%, when the first access probability is greater than 50%, the base station in the connection direction corresponding to the first access probability meeting 50% is determined as the base station capable of handover, and the specific predetermined threshold may be Set according to the actual situation. The above technical solution calculates the angle between the moving direction of the mobile terminal and the connection direction of each base station, and then obtains the first access probability by using a weighting method, so that the mobile terminal can be conveniently calculated. The similarity between the connection direction between the position and the position of each base station in the area and the moving direction, only a calculation method is enumerated above, and of course, a calculation method similar to the cosine value of the included angle can be obtained. Degree, but not limited to this.

Optionally, on the basis of the foregoing embodiment, after calculating the similarity between the moving direction of the mobile terminal and the connection direction of each mobile station in the mobile terminal and the area, the method further includes:

Obtaining a distance from the mobile terminal to each base station in the area, and calculating, according to the distance, a second access probability that the mobile terminal can switch to each base station in the area;

Obtaining, according to the first access probability and the second access probability, a third access probability that the mobile terminal can switch to each base station in the area.

In this embodiment, the distance between the mobile terminal and the base stations may be considered in consideration of the first access probability to determine the similarity. FIG. 4 is a schematic diagram of predicting a mobile terminal switching base station according to an embodiment of the present invention. A schematic diagram of the distance calculation of the method, as shown in FIG. 4, can also consider a base station within the coverage of the radius R with the positioning position of the mobile terminal as the center. Since the mobile terminal tends to access the base station nearest to him without considering the load and interference, the second access probability of the corresponding base station can be calculated by calculating the expression (6):

Wherein, N is the number of base stations within said area, N being a positive integer equal to or greater than 1, d ₁ ...... d _N is the distance between each base station and the mobile terminals in the area, P _i is the The second access probability of the i-th base station in the area, d _i is the distance between the i-th base station and the mobile terminal in the area, 1≤i≤N.

And considering the first access probability and the second access probability simultaneously, and then obtaining a corresponding third access probability by using the weighting method according to the two access probabilities, and the calculation expression (7) is as follows:

Where N is the number of base stations in the area, θ ₁ ... θ _N is the angle between the connection direction of each base station in the area and the moving direction of the mobile terminal, and θ _i is the area An angle between a connection direction of the i-th base station and a moving direction of the mobile terminal, d ₁ . . . D _N is a distance between each base station and the mobile terminal in the area, and d _i is the The distance between the i-th base station and the mobile terminal in the area, P _i is the third access probability of the i-th base station in the area, and α is a weighting parameter, and the value range is greater than 1.

Optionally, on the basis of the foregoing embodiment, when the obtained similarity meets the predetermined threshold, determining, by the base station in the connection direction corresponding to the similarity that meets the predetermined threshold, the pre-handover base station includes:

When the third access probability satisfies a predetermined threshold, the base station in the connection direction corresponding to the third access probability is determined as a pre-handover base station.

In this embodiment, when the third access probability is greater than the predetermined threshold, the third access probability is larger, and the third access probability corresponds to the base station in the connection direction being more suitable as the pre-handover base station. For example, if the predetermined threshold is 60%, when the third access probability satisfies greater than 60%, the base station in the connection direction corresponding to 60% of the third access probability is determined to be a base station capable of handover, and the specific reservation is performed. The threshold can be set according to the actual situation.

After calculating the angle between the connection direction between the positioning position of the mobile terminal and the position of each base station in the area and the moving direction, the distance between the mobile terminal and the base stations is considered, and then according to the angle and The distance obtains a third access probability according to the weighting method, so that the base station that the mobile terminal can perform handover can be more accurately predicted.

Optionally, after the angle between the connection direction between the positioning position of the mobile terminal and the location of each base station in the area and the moving direction is respectively calculated on the basis of the foregoing embodiment, The method also includes:

If a plurality of equal angles are obtained, the distances of the mobile terminals to the base stations in the area corresponding to the equal angles are respectively acquired.

In this embodiment, since in some cases, the angle between the connection direction between the positioning position of the mobile terminal and the position of each base station in the area and the moving direction is separately calculated, there are multiple The angles are the same, that is, the connection direction between the positioning position of the mobile terminal and the position of the plurality of base stations in the area is the same as the similarity of the moving direction, and the base station in the connection direction corresponding to the same angle may be used. Further, the determination is made according to the distance from the mobile terminal. Therefore, the data processing center can separately acquire the distance between the base station corresponding to the connection direction and the mobile terminal in the same connection direction.

Optionally, on the basis of the foregoing embodiment, when the obtained similarity meets the predetermined threshold, determining, by the base station in the connection direction corresponding to the similarity that meets the predetermined threshold, the pre-handover base station includes:

When the acquired distance satisfies less than a predetermined threshold, the base station in the connection direction corresponding to the distance is determined as a pre-handover base station.

In this embodiment, the distance between the base station corresponding to the connection direction and the mobile terminal is measured respectively, and the threshold of the distance may be set, for example, if the predetermined distance is 100 meters, when the measured distance is less than At 100 meters, it can be determined that the base station less than 100 meters can be switched, and the specific threshold can be set according to the actual situation.

In some cases, the angle between the connection position between the location of the mobile terminal and the location of the plurality of base stations in the area is the same as the direction of movement of the mobile terminal, and the base stations and the mobile terminals having the same angle may be further considered. The distance between them more accurately determines the base station that the mobile terminal is capable of switching.

Optionally, on the basis of the foregoing embodiment, the method further includes:

A threshold value of the number of base stations that the mobile terminal can pre-switch is determined according to the density of the base stations in the area.

In actual application scenarios, it is easy to think that the more base stations that can be switched, the greater the probability of successful handover and the higher the accuracy of prediction. However, the more base stations that can be switched, the more This means that more resources need to be allocated to these base stations, which correspondingly reduces the utilization of resources. Therefore, the threshold of the number of base stations that can be switched can be found according to the density of base stations in the area.

By determining the threshold value that the mobile terminal can switch to the base station, the accuracy of the prediction can be maximized, and it is convenient to provide better service to the user and improve user satisfaction.

The following is a specific example of the technical solution of the embodiment of the present invention. FIG. 5 is a schematic diagram of an application scenario of a method for predicting a mobile terminal to switch a base station according to an embodiment of the present invention, as shown in FIG.

The application scenario is a dense block in a typical scene of an ultra-dense network, and may be a network in which a small cell and a micro cell coexist. A single cell exists in a Macro cell, and the deployment of the Small cell belongs to the scenario. Obey the Poisson Point Process (Poison Point Process), and the coverage between the Small cells overlaps, wherein the arrowed curve ab in Figure 5 represents the actual movement track of the mobile terminal, and the service TP represents the user currently accessing the TP; The main function of the synchronization service TP is to perform data synchronization on the current state of the service TP, and select the service TP at the next moment from the synchronization service TP, that is, predict the base station that the mobile terminal can switch. The asynchronous service TP neither provides services to users nor is it a potential service TP at the next moment.

In order to avoid the mobile terminal residing in any Small cell for a long time, the reservation for its resources leads to The resource is wasted, and the coverage of the Small cell is divided. Only when the user moves to the edge area of the Small cell, the user mobility prediction is required, Tier-1 is a non-predicted area, and Tier-2 is a prediction area.

The method for predicting a handover of a base station by a mobile terminal in this scenario includes:

Step 1: acquiring location coordinates of the mobile terminal;

For example, the OTV (Observed Time Difference of Arrival) is used as an example to obtain the current position coordinates of the mobile terminal and save it. The indoor scene is taken as an example to obtain the current coordinates of the mobile terminal, and the coordinate information can be saved. In the macro station or data processing center.

Step 2: performing prediction of a movement trajectory of the mobile terminal;

The macro station (or data processing center) determines whether the mobile terminal needs to perform prediction according to the positioning result of the mobile terminal. If prediction is needed, the macro station uses the Lagrange interpolation polynomial to fit the current movement trajectory using the position coordinates of the mobile terminal t and the previous time. The specific position coordinates of the TP distribution are also stored in the macro station (or data processing center). ), the macro station (or data processing center) may consider a set of sites with a radius R within the center of the current location of the mobile terminal. The macro station (or data processing center) calculates the access probability of different stations in the site set based on the direction or/and the distance, and determines the synchronous TP set according to the size of the access probability.

Step 3: The macro station (or data processing center) guides the determined synchronization TP set to synchronize data with the current service TP of the mobile terminal and reserve resources.

Optionally, FIG. 6 is a schematic diagram of a simulation of a mobile terminal to switch a base station according to an embodiment of the present invention. As shown in FIG. 6, the service TP refers to a TP that the mobile terminal is currently connected to provide, and the synchronous TP It refers to multiple TP sets selected according to the prediction result. The service TP handover success refers to the service TP handover of the mobile terminal, and the new service TP is included in the synchronous TP set, that is, the new service TP is Synchronize any one of the TP sets; otherwise, if the new service TP is not included in the synchronous TP set, the handover is unsuccessful.

The synchronous TP is a station with a relatively large access probability selected from the prediction results. It can synchronize and reserve resources in advance, reduce the handover delay of the mobile terminal, and improve the probability of successful handover. Therefore, the simulation is carried out in the aforementioned dense block scenario, and the distribution of the stations is subject to the PPP (Poisson Point Process) distribution, assuming that the site density can be 100/km2 (km ² ), 500/km ^{2 respectively.} , 1000 / km ² , 2000 / km ² , 6000 / km ² , 10000 / km ² , 14000 / km ² , the mobile terminal's moving speed is 3 m / s (m / s), consider this A site within 1.5 times the average distance of the mobile terminal around the mobile terminal.

It can be seen from Fig. 6 that under different site density conditions, the prediction accuracy increases first and then becomes more stable with the increase of synchronous TP number. When the station density is low, the prediction accuracy curve will be faster and smoother. When the site density is high, the prediction accuracy curve will reach a stable state when the number of synchronized TPs is large. Therefore, it can be concluded that the number of synchronized TPs has a great influence on the prediction accuracy, but there is a threshold for the number of synchronous TPs. In this simulation, when the number of synchronized TPs is 5, different densities Under the condition of site distribution, the prediction accuracy will reach a higher prediction accuracy and tend to be stable.

In the above embodiment, by acquiring the positioning position of the mobile terminal and recording the formed movement trajectory data, the movement trajectory of the mobile terminal is obtained by Lagrangian interpolation, and the moving direction of the mobile terminal and the mobile terminal and the area are respectively calculated. The similarity of the connection direction of each base station, when the obtained similarity satisfies the predetermined threshold, the base station in the connection direction corresponding to the similarity satisfying the predetermined threshold is determined as the pre-handover base station, so that the user can be prepared in advance The resource avoids the conversion delay of the serving base station, thereby ensuring the user's efficient and stable service quality.

Embodiment 2

FIG. 7 is a schematic structural diagram of Embodiment 1 of a device for predicting a mobile terminal to switch a base station according to an embodiment of the present invention. As shown in FIG. 7, the device includes: an obtaining module 10, a calculating module 20, and a prediction module 30;

The acquiring module 10 is configured to acquire a positioning position of the mobile terminal, record the formed movement trajectory data, and obtain a moving direction of the mobile terminal according to the recorded movement trajectory data;

The calculating module 20 is configured to separately calculate a similarity between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area;

The prediction module 30 is configured to determine, when the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition as the pre-handover base station.

The method and device for predicting a mobile terminal to switch a base station according to an embodiment of the present invention include: an obtaining module, a calculating module, and a prediction determining module, acquiring a positioning position of the mobile terminal by the acquiring module, and recording the formed moving track data according to the recorded The movement trajectory data obtains the moving direction of the mobile terminal, and the calculation module respectively calculates the similarity between the moving direction of the mobile terminal and the connection direction of the mobile terminal and each base station in the area, and the prediction module obtains similarity When the degree meets the predetermined threshold, the base station in the connection direction corresponding to the similarity that meets the predetermined threshold is determined as the pre-handover base station, so that the user can prepare resources in advance, avoiding the conversion delay of the serving base station, thereby ensuring the user's efficiency. Stable service quality.

Optionally, on the basis of the foregoing embodiment, the calculating module 20 calculates, respectively, the similarity between the moving direction of the mobile terminal and the connection direction of each mobile station in the mobile terminal and the area:

Calculating, respectively, an angle between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area, and separately calculating a first time that the mobile terminal can switch to each base station in the area Access probability.

The device provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

Optionally, on the basis of the foregoing embodiment, the prediction module 30 determines, when the obtained similarity satisfies the predetermined condition, that the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition is determined as a pre- Switch base station:

When the obtained first access probability satisfies a predetermined threshold, the base station in the connection direction corresponding to the first access probability is determined as a pre-handover base station.

The device provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

Optionally, on the basis of the foregoing embodiment, the calculating module 20 is further configured to:

Obtaining a distance from the mobile terminal to each base station in the area, and obtaining, according to the acquired distance, a second access probability that the mobile terminal can switch to each base station in the area;

Obtaining, according to the first access probability and the second access probability, a third access probability that the mobile terminal can switch to each base station in the area.

The device provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

Optionally, on the basis of the foregoing embodiment, the prediction module 30 determines, when the obtained similarity satisfies a predetermined threshold, that the base station in the connection direction corresponding to the similarity that meets the predetermined threshold is determined as a pre- Switch base station:

When the obtained third access probability satisfies the predetermined threshold, the base station in the connection direction corresponding to the third access probability is determined as the pre-handover base station.

The device provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

Optionally, on the basis of the foregoing embodiment, the calculating module 20 is further configured to:

If the obtained angles are equal to each other, the distances of the mobile terminals to the base stations in the area corresponding to the equal angles are respectively acquired.

The device provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

Optionally, on the basis of the foregoing embodiment, the prediction module 30 determines, when the obtained similarity satisfies a predetermined threshold, that the base station in the connection direction corresponding to the similarity that meets the predetermined threshold is determined as a pre- Switch base station:

When the acquired distance satisfies less than a predetermined threshold, the base station in the connection direction corresponding to the distance is determined as a pre-handover base station.

The device provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

Optionally, as shown in FIG. 7, on the basis of the foregoing embodiment, the apparatus further includes: a threshold module 40;

The threshold module 40 is configured to determine a threshold value of the number of base stations that the mobile terminal can pre-switch according to the density of the base stations in the area.

The device provided by the embodiment of the present invention may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.

The embodiments disclosed in the present application are as described above, but the description is only for the purpose of understanding the present application, and is not intended to limit the present application. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

The embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and when the computer executable instructions are executed, a method for predicting a mobile terminal to switch base stations is implemented.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. This application is not limited to any specific combination of hardware and software. A person skilled in the art should understand that the technical solutions of the present application can be modified or equivalent, without departing from the spirit and scope of the technical solutions of the present application, and should be included in the scope of the claims of the present application.

Industrial applicability

The foregoing technical solution can prepare resources for the user in advance, avoiding the conversion delay of the serving base station, thereby ensuring efficient and stable service quality of the user.

Claims (16)

1. A method for predicting a handover of a base station by a mobile terminal, the method comprising:

   Obtaining a positioning position of the mobile terminal, recording the movement trajectory data formed by the positioning position, and obtaining a moving direction of the mobile terminal according to the recorded movement trajectory data;

   Calculating, respectively, a similarity between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area;

   When the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity satisfying the predetermined condition is determined as the pre-handover base station.
2. The method according to claim 1, wherein calculating the similarity between the moving direction of the mobile terminal and the connection direction of each mobile station and each base station in the area, respectively:

   Calculating, respectively, an angle between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area, and separately calculating a first time that the mobile terminal can switch to each base station in the area Access probability.
3. The method according to claim 2, wherein, when the obtained similarity satisfies a predetermined condition, determining, by the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition, is a pre-handover base station, including:

   When the obtained first access probability is greater than the predetermined threshold, the base station in the connection direction corresponding to the first access probability is determined as a pre-handover base station.
4. The method of claim 1, after the calculating the similarity between the moving direction of the mobile terminal and the connection direction of the mobile terminal and each base station in the area, the method further includes:

   Obtaining a distance from the mobile terminal to each base station in the area, and obtaining, according to the acquired distance, a second access probability that the mobile terminal can switch to each base station in the area;

   Obtaining, according to the first access probability and the second access probability, a third access probability that the mobile terminal can switch to each base station in the area.
5. The method according to claim 4, wherein, when the obtained similarity satisfies a predetermined condition, determining, by the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition, is a pre-handover base station, including:

   When the third access probability is greater than the predetermined threshold, the base station in the connection direction corresponding to the third access probability is determined as a pre-handover base station.
6. The method of claim 2, after separately calculating an angle between a moving direction of the mobile terminal and a connection direction of the mobile terminal and each base station in the area, the method further includes:

   If a plurality of equal angles are obtained, the distances of the mobile terminals to the base stations in the area corresponding to the equal angles are respectively acquired.
7. The method according to claim 6, wherein when the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity satisfying the predetermined condition is determined as the pre-handover base station, including:

   When the acquired distance is less than the predetermined threshold, the base station in the connection direction corresponding to the distance is determined as a pre-handover base station.
8. The method of any of claims 1-7, the method further comprising:

   A threshold value of the number of base stations that the mobile terminal can pre-switch is determined according to the density of the base stations in the area.
9. An apparatus for predicting a handover of a base station by a mobile terminal, the apparatus comprising: an acquisition module, a calculation module, and a prediction module;

   The acquiring module is configured to acquire a positioning position of the mobile terminal, record the movement trajectory data formed by the positioning position, and obtain a moving direction of the mobile terminal according to the recorded movement trajectory data;

   The calculating module is configured to separately calculate a similarity between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area;

   The prediction module is configured to determine, when the obtained similarity satisfies the predetermined condition, the base station in the connection direction corresponding to the similarity that satisfies the predetermined condition as the pre-handover base station.
10. The apparatus according to claim 9, wherein the calculating module respectively calculates the similarity between the moving direction of the mobile terminal and the connection direction of each base station in the mobile terminal and the area:

    Calculating, respectively, an angle between a moving direction of the mobile terminal and a connection direction of each mobile station and each base station in the area, and separately calculating that the mobile terminal can switch to each of the areas The first access probability of the base stations.
11. The apparatus according to claim 10, wherein the prediction module determines that, when the obtained similarity satisfies a predetermined condition, the base station in the connection direction corresponding to the similarity satisfying the predetermined condition is determined as the pre-switched base station. :

    When the obtained first access probability is greater than the predetermined threshold, the base station in the connection direction corresponding to the first access probability is determined as a pre-handover base station.
12. The apparatus of claim 10 wherein said computing module is further configured to:

    Obtaining a distance from the mobile terminal to each base station in the area, and obtaining, according to the acquired distance, a second access probability that the mobile terminal can switch to each base station in the area;

    Obtaining, according to the first access probability and the second access probability, a third access probability that the mobile terminal can switch to each base station in the area.
13. The apparatus according to claim 12, wherein the prediction module determines that, when the obtained similarity satisfies a predetermined condition, the base station in the connection direction corresponding to the similarity satisfying the predetermined condition is determined as the pre-switched base station. :

    When the obtained third access probability is greater than the predetermined threshold, the base station in the connection direction corresponding to the third access probability is determined as the pre-handover base station.
14. The apparatus of claim 10 wherein said computing module is further configured to:

    If a plurality of equal angles are obtained, the distances of the mobile terminals to the base stations in the area corresponding to the equal angles are respectively acquired.
15. The apparatus according to claim 14, wherein the prediction module determines that, when the obtained similarity satisfies a predetermined condition, the base station in the connection direction corresponding to the similarity satisfying the predetermined condition is determined as the pre-handover base station. :

    When the acquired distance is less than the predetermined threshold, the base station in the connection direction corresponding to the distance is determined as a pre-handover base station.
16. The apparatus of any one of claims 9-15, the apparatus further comprising: a threshold module;

    The threshold module is configured to determine a threshold value of the number of base stations that the mobile terminal can pre-switch according to the density of the base stations in the area.

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