CN114286409B - Method, system, device and storage medium for attaching base station to user terminal - Google Patents
Method, system, device and storage medium for attaching base station to user terminal Download PDFInfo
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Abstract
The invention discloses a method, a system, a device and a storage medium for a user terminal to attach a base station. According to the invention, when the user terminal moves along the moving track, the user terminal is switched to the attached target base station, or the user terminal is kept attached to the target base station, so that a relatively fixed corresponding relation between the target base station attached to the user terminal and the moving track of the user terminal can be established, and the user terminal is attached to the corresponding target base station when moving along the moving track, so that the user terminal obtains longer continuous attaching time, thereby avoiding frequent switching of the attached base station, and being beneficial to improving the working efficiency and the communication quality of a communication network. The invention is widely applied to the technical field of communication networks.
Description
Technical Field
The present invention relates to the field of communications network technologies, and in particular, to a method, a system, an apparatus, and a storage medium for attaching a base station to a user terminal.
Background
When accessing a communication network, a user terminal needs to attach to a certain base station, and when the user terminal moves, the user terminal needs to switch the attached base station to maintain access to the communication network. With the improvement of life quality, the traveling situations of people driving automobiles, riding high-speed rails and other transportation means are more and more common, the moving speed of a user terminal is higher and higher, the prior relevant technology of the user terminal for attaching and switching a base station is applied, the average attaching time of the user terminal to a single base station is shorter and shorter, the attaching switching of the user terminal to the base station is more and more frequent, the base station and the user terminal are required to perform relevant data processing in the switching process, the resources of the base station and the user terminal are occupied, the working efficiency of the whole communication system is reduced, phenomena such as communication terminals and the like are likely to occur in the switching process, and the normal operation of the communication process is affected.
Interpretation of terms:
UE, is the abbreviation of User Equipment, namely User terminal;
NWDAF, which is an abbreviation of Network Data Analytics Function, namely Network Data analysis Function;
NF, is an abbreviation of Network Function, i.e. Network Function;
AF, an abbreviation of Application Function, namely network Application Function;
OAM, is an abbreviation of Operation Administration and Maintenance, i.e., operation, administration, and Maintenance.
Disclosure of Invention
The invention aims to provide a method, a system, a device and a storage medium for attaching a base station to a user terminal, aiming at the problem that the prior art related to the attachment and the switching of the user terminal to the base station is difficult to adapt to at least one technical problem of the application scene that the user carries the user terminal to take a high-speed vehicle.
In one aspect, an embodiment of the present invention includes a method for a user equipment to attach to a base station, including:
acquiring position information of a user terminal;
determining a base station capable of covering the user terminal and the coverage range of the base station;
determining a moving track of the user terminal according to the position information;
determining one or more target base stations in all the base stations according to the moving track of the user terminal and the coverage area of the base stations;
and when the user terminal moves along the moving track, switching the user terminal to be attached to the target base station, or keeping the user terminal attached to the target base station.
Further, the determining the movement track of the user terminal according to the location information includes:
searching a fixed path passing through the position shown by the position information;
and when the only fixed path is found, taking the fixed path as the moving track of the user terminal.
Further, the determining the movement track of the user terminal according to the location information further includes:
when a plurality of fixed paths are found, sampling values of the position information at a plurality of different times are obtained;
screening a target fixed path from the fixed paths; the target fixed path is a fixed path passing through the corresponding position of each sampling value of the position information at the same time;
and taking the target fixed path as the moving track of the user terminal.
Further, the determining the movement track of the user terminal according to the location information further includes:
truncating the fixed path to the length threshold when the length of the fixed path exceeds the length threshold.
Further, the length threshold is determined by:
acquiring the moving speed of the user terminal;
setting a time threshold;
setting the length threshold as a product of the movement speed and the time threshold.
Further, the determining one or more target base stations in all the base stations according to the moving track of the user terminal and the coverage area of the base station includes:
and determining the base station with the longest intersection of the coverage area and the movement track of the user terminal as the target base station.
Further, the determining one or more target base stations in all the base stations according to the moving track of the user terminal and the coverage area of the base station includes:
performing a plurality of distribution processes on the moving track;
in each allocation process, determining continuous intersections of the unallocated parts of the moving track and the coverage range of each base station respectively, allocating the continuous intersection with the longest length in each continuous intersection to the base station which completely covers the continuous intersection, and determining the base station allocated with the continuous intersection as the target base station; the unallocated portion of the movement trajectory in each allocation process is a portion of the movement trajectory that was not allocated to any base station before the allocation process.
Further, the switching the ue to attach to the target base station or keeping the ue attached to the target base station includes:
if the user terminal is not attached to the target base station when the user terminal is in the coverage range of the target base station, switching the user terminal to be attached to the target base station;
and if the user terminal is attached to the target base station when the user terminal is in the coverage range of the target base station, at least until the user terminal leaves the moving track, keeping the user terminal attached to the target base station.
In another aspect, an embodiment of the present invention further includes a computer apparatus, which includes a memory and a processor, where the memory is configured to store at least one program, and the processor is configured to load the at least one program to perform the method for attaching a base station to a user terminal in the embodiment.
In another aspect, the present invention further includes a storage medium, in which a processor-executable program is stored, and the processor-executable program is used for executing the method for attaching a base station to a user terminal in the embodiment when executed by a processor.
The invention has the beneficial effects that: in the method for attaching the user terminal to the base station in the embodiment, the target base station is determined in all the base stations according to the moving track of the user terminal and the coverage of the base station, when the user terminal moves along the moving track, the user terminal is switched to the attached target base station, or the user terminal is kept to be attached to the target base station, a relatively fixed corresponding relation between the target base station attached to the user terminal and the moving track of the user terminal can be established, and the user terminal is attached to the corresponding target base station when moving along the moving track, so that the user terminal obtains longer continuous attaching time, frequent base station switching is avoided, and the working efficiency and the communication quality of a communication network are improved.
Drawings
FIG. 1 is a flowchart illustrating a method for attaching a user equipment to a base station according to an embodiment;
FIG. 2 is a schematic diagram of determining a target base station among all base stations according to a moving track of a user equipment and a coverage area of the base station in an embodiment
Fig. 3 is another schematic diagram of determining a target base station among all base stations according to a moving track of a user terminal and a coverage area of the base station in the embodiment.
Detailed Description
In this embodiment, referring to fig. 1, a method for a user terminal to attach to a base station includes the following steps:
s1, acquiring position information of a user terminal;
s2, determining a base station capable of covering the user terminal and the coverage range of the base station;
s3, determining a moving track of the user terminal according to the position information;
s4, determining one or more target base stations in all the base stations according to the moving track of the user terminal and the coverage area of the base stations;
and S5, switching the user terminal to the attachment target base station, or keeping the user terminal attached to the attachment target base station.
Steps S1-S5 may be performed by an NWDAF network element in a 5G core network. Data required by the NWDAF network element in the process of executing steps S1-S5 can be acquired by subscribing a data notification from the NF network element, the AF network element or the OAM network element.
In step S1, the NWDAF may dig an NF/OAM/AF data plane through the DPI probe server to obtain location information of the user terminal, and the DPI probe server may obtain, from the N4 port data plane on the UPF side, location information (longitude and latitude information from GPS or beidou location) sent by a navigation chip of the user terminal UE itself, or may actively report the location information by the user terminal. In this embodiment, information that can indicate the geographical location of the user terminal, such as the longitude and latitude where the user terminal UE is located, is referred to as location information of the user terminal.
In step S2, the UE normally accesses the network and starts positioning, the data plane initiates a service request, the UE reports information such as longitude and latitude obtained by positioning to the NWDAF, and the UE reports information such as the ID and the position of the base station currently attached to the UE to the NWDAF through the signaling plane. The NWDAF sends out a data subscription message and collects user attachment information such as IMSI, base station ID, attachment time and the like to an NF network element/OAM network element/AF network element.
The format of these pieces of information collected by the NWDAF in steps S1 and S2 is shown in table 1.
TABLE 1
In table 1: the IMSI has 15 digits in total, and the structure is as follows: MCC + MNC + MIN
MCC: mobile Country Code, 3 bits in total, china is 460;
MNC: mobile Network Code, 2 bits in total, for example, 03 is used in a CDMA system in unicom;
MIN: the total number of 10 bits, the structure is as follows: 09 M0M1M3 + ABCD;
IMSI：46001 0642X XXXXX。
in IMSI, position 10: 7 stands for 145 cards, 6 stands for 186, 3 stands for 156, 0 stands for 130
The 6 th to 9 th bits represent the attribution, and the 6 th to 9 th bits represent the 5 th, 6 th, 7 th and 4 th bits of the mobile phone respectively
For example 0642 may be converted to digits 4 through 7 2064 of a mobile phone number.
In step S2, the NWDAF may obtain the coverage area of each base station through the base station management system, and if the coverage area of one base station includes the location of the user terminal, that is, the location indicated by the location information of the user terminal, it may be determined that the base station can cover the user terminal; if a base station is being attached by a user terminal, it can be directly confirmed that the base station can cover the user terminal; the NWDAF may also instruct a base station to attempt to establish communication with the ue, or instruct the ue to attempt to establish communication with a base station, and if handshaking and the like can be completed, it may directly confirm that the base station can cover the ue. In this embodiment, when referring to a base station, it may be default that the base station is a base station whose signal can cover the ue without specific reference.
In step S3, the NWDAF analyzes the position information of the user terminal to determine the movement trajectory of the user terminal.
Specifically, the NWDAF may obtain sampling values of the location information of the user terminal at a plurality of different times, thereby obtaining a location that the user terminal has arrived within a past period of time, and may obtain a historical track of the user terminal after smoothing. The historical track of the user terminal can be regarded as a time sequence, and the NWDAF can predict the trend of the historical track of the user terminal through the long-short term memory artificial neural network LSTM, so as to predict the moving track of the user terminal in a future period of time. The method predicts the trend of the historical track of the user terminal by applying the long-short term memory artificial neural network LSTM, and can determine the moving track of the user terminal under the condition that the user terminal freely moves.
Since the user moves along a relatively fixed path in many situations during the process of taking a vehicle, the moving track of the user terminal can be determined by combining the characteristic, and the result has lower uncertainty and smaller error than the result obtained by applying a prediction algorithm such as a long-short term memory artificial neural network LSTM. For example, the user terminal moves along a road while the user is driving or riding in a car; when a user rides a high-speed rail, the user terminal moves along a specific railway track; when a user rides a ship, the user terminal moves along a specific navigation channel; when a user takes an airplane, the user terminal moves along a specific air route; when a user takes a bus, the bus also moves on a relatively fixed bus running route. Even if the automobile changes lanes on the same road and the like, the displacement of the user terminal in the direction perpendicular to the extending direction of the road is smaller than that in the extending direction of the road, the road can be regarded as one line, and similarly, the railway, the navigation channel, the air route and the bus running route can be regarded as one line.
Based on the above principle, when performing step S3, the NWDAF may specifically perform the following steps:
s301, searching a fixed path passing through the position shown by the position information;
s302, when the unique fixed path is found, the fixed path is used as a moving track of the user terminal.
S303, when a plurality of fixed paths are found, obtaining sampling values of the position information at a plurality of different times;
s304, screening out a target fixed path from each fixed path; the target fixed path is a fixed path passing through the corresponding position of each sampling value of the position information at the same time;
and S305, taking the target fixed path as a moving track of the user terminal.
In step S301, after obtaining the location information of the user terminal, the NWDAF may determine the location of the user terminal, and may search the database for which fixed paths pass through the location of the user terminal. For example, the NWDAF may be actively set by the user or analyze the vehicle the user is currently riding in through artificial intelligence; when a user drives or rides a car, the NWDAF can search the position of a highway passing through the user terminal from the map database; when a user rides on a high-speed rail, the NWDAF can search the railway management system for which railway tracks pass through the position of the user terminal; when a user takes a bus, the NWDAF can search the bus management system for the bus routes passing through the position of the user terminal.
The road, railway, channel, airline or bus running route passing through the position of the user terminal is limited or even unique. In step S302, if a unique fixed path is found, for example, a position where only one road passes through the user terminal is found, or a position where only one railway passes through the user terminal is found, the fixed path, that is, the unique road or railway, etc. may be determined as the moving track of the user terminal.
In step S301, under the condition that the location information of the user only includes the sampling value at one of the moments, the location information of the user only indicates the location of the user at a certain moment, for example, the current location of the user, so that the location of the user terminal where more than one fixed path passes through may be found, for example, the location of the user terminal where multiple roads, multiple railways, and multiple airlines simultaneously pass through is found under the conditions that only the ground dimension is considered and the height direction is not considered. In step S303, the sampling values of the position information at different times may be obtained, the position information of the user includes sampling values at multiple times, and the position information of the user can indicate the position of the user in the past time period, so that the position information of the user may be represented as a track curve.
In step S304, a target fixed path may be screened from a plurality of fixed paths passing through the current location of the user, where the target fixed path is a path passing through the corresponding location of each sampling value of the location information at the same time, that is, at least a part of the target fixed path may coincide with a trajectory curve represented by the location information of the user. If the position information of the user can be represented as a track curve under the condition of acquiring a plurality of sampling values of the position information at different time, a plurality of fixed paths can still be found, at least one part of each fixed path can be superposed with the track curve, and the sampling of the position information can be increased, so that the track curve represented by the position information of the user is prolonged, and the only target fixed path which can be partially or completely superposed with the track curve is screened out.
In step S305, the screened unique target fixed path is used as the moving track of the user terminal.
After determining the fixed path as the moving track of the user terminal in step S305, a length threshold may be preset, the length of the fixed path may be analyzed, and if the length of the fixed path exceeds the length threshold, the fixed path may be truncated. Specifically, for the whole fixed path, the length of the position information of the user terminal is 0, the part reaching the length threshold is reserved, and other parts of the fixed path, namely the part with the length larger than the length threshold, are deleted, so that the fixed path is shortened to the length which is the same as the length threshold.
By truncating the fixed path to the same length as the length threshold, the uncertainty and error associated with an excessively long fixed path may be avoided. For example, when the fixed path is a road, a railway, or a flight path, the fixed path may have a length of hundreds of kilometers or even thousands of kilometers, and the user terminal does not necessarily travel the whole distance of the road, the railway, or the flight path, so that shortening the fixed path can avoid an excessively long moving track of the user terminal and avoid unnecessary data processing.
When the fixed path is shortened, the length threshold value can be determined according to the product of the moving speed of the user terminal and the time threshold value, for example, the time threshold value is set to be 1min, and when the moving track of the user terminal is on a highway, the length threshold value can be set to be 1km-2km because the general speed of an automobile is 60km/h-120 km/h; when the moving track of the user terminal is on a railway, the speed of a high-speed rail can reach 300km/h, and the length threshold value can be set to be 5km. Therefore, the problem of setting the length threshold is converted into the problem of setting the time threshold, the determination process of the fixed path essentially belongs to the prediction process, and the setting of the time threshold in the prediction process is more convenient and visual.
By executing steps S301 to S305, the movement trajectory of the user terminal can be quickly determined according to the general characteristics of the user trip and the relative fixity of the movement trajectory of the transportation means, and the data processing amount in the process of determining the movement trajectory of the user terminal can be reduced.
After performing steps S1 to S3, the NWDAF may perform step S4 to determine one or more target base stations in all the base stations according to the moving track of the user terminal and the coverage of the base stations.
The principle of step S4 can be referred to fig. 2. In fig. 2, three base stations of α, β, and γ are provided, and the coverage area of each base station is shown by an ellipse including the base station. The straight line in the middle of fig. 2 represents a movement track of the user terminal, and specifically may be a track extending from a railway on which the user terminal rides on the high-speed rail, and the user terminal rides on the high-speed rail and moves from the upper part of fig. 2 to the lower part of fig. 2 along the movement track.
In fig. 2, the position indicated by the solid dots is the position of the user terminal at the current time, that is, the position indicated by the position information acquired in step S1, and at this time, the user terminal is located in both the coverage of the base station α and the coverage of the base station β. The NWDAF may calculate an intersection of the coverage area of each base station and the movement track of the user terminal, and compare the length of the intersection corresponding to each base station, and use the base station corresponding to the longest intersection as the target base station.
In fig. 2, since the extending direction of the moving track of the user terminal is from top to bottom, the user terminal moves to the position of the solid dot, and therefore, only the portion below the solid dot may be considered. Thus, the intersection of the coverage area of the base station α and the movement track of the ue is the α segment in fig. 2, the intersection of the coverage area of the base station β and the movement track of the ue is the β segment in fig. 2, and the length of the β segment is greater than that of the α segment, so that the base station β can be determined as the target base station. In step S5, the ue is switched to the target base station, i.e. the base station β, or the target base station, i.e. the base station β, to which the ue is attached is maintained.
The principle of fig. 2 is that: the α segment is the intersection of the coverage of the base station α and the movement trajectory of the user terminal, the β segment is the intersection of the coverage of the base station β and the movement trajectory of the user terminal, and the length of the β segment is greater than the length of the α segment, which indicates that the time covered by the base station β is longer than the time covered by the base station α when the user terminal is simultaneously covered by the base station α and the base station β, so that the user terminal is switched to the attached base station β from the current time (i.e., when the user terminal is located at the position indicated by the solid dot in fig. 2), or the user terminal is kept attached to the base station β, so that the user terminal can obtain a longer continuous attachment time without switching the attached base station, thereby avoiding frequent switching of the attached base station, and contributing to improvement of the working efficiency and the communication quality of the communication network.
In this embodiment, when the moving trajectory of the ue is an irregular curve, so that the moving trajectory of the ue and the coverage area of the base station are not a simple straight line intersecting relationship, the NWDAF may specifically perform the following steps when performing step S4, that is, determining one or more target base stations in all the base stations according to the moving trajectory of the ue and the coverage area of the base station:
s401, carrying out multiple distribution processes on the moving track;
s402, in each distribution process, determining continuous intersection of the unallocated part of the moving track and the coverage range of each base station, distributing the continuous intersection with the longest length in each continuous intersection to the base station which completely covers the continuous intersection, and determining the base station distributed with the continuous intersection as a target base station; the unallocated part of the moving track in each allocation process is the part of the moving track which is not allocated to any base station before the allocation process.
The principle of steps S401-S402 can be referred to fig. 3. The curve from top to bottom in the center of fig. 3 is the moving track of the UE, the UE position represents the current location of the UE indicated by the location information of the UE, the UE position is the location of point a, and point a is the first intersection point of the moving track and the coverage area of the base station α.
Performing a plurality of allocation procedures:
in the first assignment process, since the moving trajectory is not assigned before, the whole moving trajectory (which may BE defined as the portion between points a to G in fig. 3) belongs to the unallocated portion, and the unallocated portion of the moving trajectory respectively determines a continuous intersection with the coverage of each base station, where the continuous intersection refers to a continuous intersection formed by the unallocated portion of the moving trajectory and the coverage of one base station, and if the intersection formed by the unallocated portion of the moving trajectory and the coverage of one base station is not continuous, the intersection may BE regarded as being composed of a plurality of continuous intersections, for example, the intersection formed by the moving trajectory and the coverage of the base station α includes an AC segment and a DF segment, which are continuous, respectively, but the AC segment and the DF segment are disconnected, so that the AC segment is a continuous intersection of the moving trajectory and the coverage of the base station α, the DF segment is another continuous continuation of the moving trajectory and the coverage of the base station α, and so on, the BE segment may BE obtained as a continuous intersection of the moving trajectory and the coverage of the base station β, and the FG segment is a continuous intersection of the coverage of the moving trajectory and the like; by the decomposition mode, the unallocated part of the moving track is decomposed into segments of AC, DF, BE, FG and the like, and then the lengths of the segments of AC, DF, BE, FG and the like are compared, wherein the length of the FG segment is the largest, and the FG segment is completely covered by a base station gamma, so that the FG segment is allocated to the base station gamma, and the base station gamma is a target base station corresponding to the FG segment; since the FG segment has been assigned to the base station γ, the unassigned part of the movement locus becomes the AF segment;
in the second allocation process, a continuous intersection is obtained between the unallocated part of the moving track, namely the AF section, and the coverage range of each base station, based on the same principle, the unallocated part of the moving track can BE decomposed into sections of AC, DF, BE and the like, and then the lengths of the sections of AC, DF, BE and the like are compared, wherein the length of the DF section is the largest, the DF section is completely covered by the base station alpha, so that the DF section is allocated to the base station alpha, and the base station alpha is a target base station corresponding to the DF section; since the FG segment has been assigned to the base station γ and the DF segment has been assigned to the base station α, the unallocated portion of the movement locus becomes the AD segment;
in the third allocation process, a continuous intersection is obtained between the AD section which is the unallocated part of the moving track and the coverage range of each base station, the unallocated part of the moving track can be decomposed into sections of AC, BD and the like on the basis of the same principle, then the lengths of the sections of AC, BD and the like are compared, wherein the length of the BD section is the largest, the BD section is completely covered by the base station beta, and therefore the BD section is allocated to the base station beta, and the base station beta is a target base station corresponding to the BD section; since the BD segment has been assigned to the base station β, the unassigned part of the movement trajectory becomes the AB segment;
in the fourth allocation process, a continuous intersection is obtained between the unallocated part of the moving track, namely the AB section and the coverage range of each base station, and the AB section is distributed to the base station alpha as the AB section is the continuous intersection of the AB section and the coverage range of the base station alpha, and the base station alpha is a target base station corresponding to the AB section; since the last segment, i.e. the AB segment, has been allocated to the base station α, there is no longer an unallocated part of the movement trajectory and the entire allocation process can be ended.
The results of the above-described dispensing processes are shown in table 2.
TABLE 2
| Dispensing process | Allocated segment | Corresponding target base station |
| First dispensing process | FG | Base station gamma |
| Second dispensing process | DF | Base station alpha |
| Third dispensing process | BD | Base station beta |
| Fourth allocation procedure | AB | Base station alpha |
As can be seen from the allocation results shown in table 2, when the moving trajectory is not a regular curve such as a straight line, the steps S401 to S402 are executed to allocate each segment on the moving trajectory to the corresponding target base station, the target base station can cover the assigned segment on the moving trajectory, and the sum of the lengths of the segments into which the moving trajectory is divided is greater than that of other methods, so that the user terminal can keep the target base station unchanged in the segment as long as possible when a single base station cannot cover the entire moving trajectory but can only cover the moving trajectory by a plurality of base stations together, and thus, when the user terminal is kept attached to the target base station, the user terminal can keep attaching to the same target base station in the movement distance or movement time as long as possible, thereby avoiding frequent switching of attached base stations, and contributing to improving the working efficiency and communication quality of the communication network.
When performing step S5, that is, switching the ue to the target base station, or maintaining the target base station to which the ue is attached, the NWDAF may specifically perform the following steps:
s501, if the user terminal is not attached to the target base station when the user terminal is in the coverage range of the target base station, switching the user terminal to the attached target base station;
s502, if the user terminal is in the coverage area of the target base station, the target base station is attached, at least until the user terminal leaves the moving track, and the user terminal is kept attached to the target base station.
For example, for the allocation result shown in table 2, the ue first enters the coverage of the base station α along the movement track, i.e. reaches the point a, the corresponding target base station is the base station α, if the ue does not attach the target base station α at the point a, the ue is switched to the attachment target base station α, if the ue already attaches the target base station α at the point a, the ue is kept attached to the target base station α at least until the ue leaves the movement track shown in fig. 3, and even after the ue leaves the movement track shown in fig. 3, the ue can be kept attached to the target base station α as long as the ue is still within the coverage of the base station α.
The user terminal reaches a point B along the moving track, the corresponding target base station is a base station beta, the user terminal is switched to the target base station beta because the user terminal does not adhere to the target base station beta at the point B until the user terminal reaches a point D along the moving track, the corresponding target base station is a base station alpha, and the user terminal is switched to the target base station alpha because the user terminal does not adhere to the target base station alpha at the point D.
The method for attaching the user terminal to the base station in the embodiment may be implemented by writing a computer program for implementing the method for attaching the user terminal to the base station in the embodiment, writing the computer program into a computer device or a storage medium, and when the computer program is read out and executed, implementing the method for attaching the user terminal to the base station in the embodiment, thereby implementing the same technical effects as the method for attaching the user terminal to the base station in the embodiment.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless defined otherwise, all technical and scientific terms used in this example have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this embodiment, the term "and/or" includes any combination of one or more of the associated listed items.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one type of element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language ("e.g.," such as "etc.), provided with the present embodiment is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, operations of processes described in this embodiment can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in this embodiment (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described in this embodiment includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.
A computer program can be applied to input data to perform the functions described in this embodiment to convert the input data to generate output data that is stored to non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
The present invention is not limited to the above embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (6)
1. A method for a user terminal to attach to a base station, the method for the user terminal to attach to the base station comprising:
acquiring position information of a user terminal;
determining a base station capable of covering the user terminal and the coverage range of the base station;
determining a moving track of the user terminal according to the position information;
determining one or more target base stations in all the base stations according to the moving track of the user terminal and the coverage area of the base stations;
when the user terminal moves along the moving track, switching the user terminal to be attached to the target base station, or keeping the user terminal attached to the target base station;
determining one or more target base stations in all the base stations according to the moving track of the user terminal and the coverage area of the base stations, including:
performing a plurality of distribution processes on the moving track;
in each allocation process, determining a continuous intersection of the unallocated part of the moving track and the coverage range of each base station, wherein the continuous intersection with the longest length in each continuous intersection is allocated to the base station which completely covers the continuous intersection, and the base station allocated with the continuous intersection is determined as the target base station; the unallocated part of the moving track in each allocation process is the part of the moving track which is not allocated to any base station before the allocation process;
the determining the movement track of the user terminal according to the position information includes:
searching a fixed path passing through the position shown by the position information;
when the unique fixed path is found, taking the fixed path as the moving track of the user terminal;
the switching the ue to attach to the target bs or keeping the ue attached to the target bs includes:
if the user terminal is not attached to the target base station when the user terminal is in the coverage range of the target base station, switching the user terminal to be attached to the target base station;
and if the user terminal is in the coverage range of the target base station, the target base station is attached, and the user terminal is kept attached to the target base station at least until the user terminal leaves the moving track.
2. The method of claim 1, wherein the determining the moving track of the ue according to the location information further comprises:
when a plurality of fixed paths are found, obtaining sampling values of the position information at a plurality of different times;
screening a target fixed path from the fixed paths; the target fixed path is a fixed path which passes through the corresponding position of each sampling value of the position information at the same time;
and taking the target fixed path as a moving track of the user terminal.
3. The method of claim 1, wherein the determining a moving track of the ue according to the location information further comprises:
truncating the fixed path to the length threshold when the length of the fixed path exceeds the length threshold.
4. The method of claim 3, wherein the length threshold is determined by:
acquiring the moving speed of the user terminal;
setting a time threshold;
setting the length threshold as a product of the movement speed and the time threshold.
5. A computer arrangement comprising a memory for storing at least one program and a processor for loading the at least one program to perform the method of user terminal attachment to a base station of any of claims 1-4.
6. A storage medium having stored therein a program executable by a processor, wherein the program executable by the processor is configured to perform the method of a user terminal attaching a base station according to any one of claims 1 to 4 when executed by the processor.
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| WO2017168297A1 (en) * | 2016-03-27 | 2017-10-05 | King Abdullah University Of Science And Technology | Reducing handover signaling through base station skipping |
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| US9467923B2 (en) * | 2008-02-07 | 2016-10-11 | Broadcom Corporation | Method and system for location-based prearranged hand-off |
| CN102158920A (en) * | 2011-05-13 | 2011-08-17 | 新邮通信设备有限公司 | Selecting method of target base station during switching of base station and base station |
| CN103874149B (en) * | 2012-12-10 | 2020-06-09 | 索尼公司 | Mobile handover management method, equipment and system in wireless communication network |
| US9107132B2 (en) * | 2013-04-24 | 2015-08-11 | International Business Machines Corporation | Trajectory-aware location-based hand-offs |
| CN104902529B (en) * | 2015-04-27 | 2016-09-14 | 努比亚技术有限公司 | A kind of method for switching network, device and base station |
| CN108093449A (en) * | 2017-12-26 | 2018-05-29 | 广东欧珀移动通信有限公司 | Method for switching network and device |
| CN112055309B (en) * | 2019-06-05 | 2021-12-03 | 上海华为技术有限公司 | Communication method and related equipment |
| CN112449373A (en) * | 2019-08-30 | 2021-03-05 | 华为技术有限公司 | Communication processing method and communication processing device |
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| WO2017168297A1 (en) * | 2016-03-27 | 2017-10-05 | King Abdullah University Of Science And Technology | Reducing handover signaling through base station skipping |
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