CN113543249B - Cell switching method, device, system and storage medium - Google Patents
Cell switching method, device, system and storage medium Download PDFInfo
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- CN113543249B CN113543249B CN202110646146.3A CN202110646146A CN113543249B CN 113543249 B CN113543249 B CN 113543249B CN 202110646146 A CN202110646146 A CN 202110646146A CN 113543249 B CN113543249 B CN 113543249B
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00835—Determination of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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Abstract
The application discloses a cell switching method, a device, a system and a storage medium. The method comprises the following steps: firstly, determining a moving track of the user equipment based on the variation amplitude of a measured value (for example, reference signal received power) of each adjacent cell in the adjacent cell list in unit time; then, determining the switching priority of each adjacent cell according to the moving track, so that the switching priority of the adjacent cell which is more consistent with the moving track is higher; and then, determining a target cell from the neighbor cell list based on the switching priority and switching the user equipment to the target cell. Therefore, the adjacent cell which is consistent with the movement track prediction can be selected as the target cell for switching, so that the transition adjacent cell which only passes through a short time in the moving process is avoided, the switching rate of the cell is greatly reduced, the success rate of cell switching is correspondingly improved, the signaling overhead is reduced, and the continuity and the stability of the service of the user equipment are ensured.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a cell switching method, apparatus, system, and storage medium.
Background
In the existing method for selecting a handover target cell in a mobile communication system, the handover target cell is selected mainly according to a signal measurement value reported by a current User Equipment (UE).
However, this method only considers the state of the ue at the measurement time, and does not consider the movement trajectory of the ue, so that even if the cell with the best signal value is selected as the target cell in some scenarios, it is likely that the ue just switches to the target cell and triggers a new cell handover along with the movement of the ue. Such frequent handover not only increases the signaling interaction and thus the signaling load, but also easily causes the user equipment to drop the call and thus affects the service quality of the user equipment.
Disclosure of Invention
The applicant creatively provides a cell switching method, device, system and storage medium.
According to a first aspect of an embodiment of the present application, a cell handover method includes: determining the moving track of the user equipment based on the variation amplitude of the measurement value of each adjacent cell in the adjacent cell list in unit time, wherein the measurement value comprises at least one of reference signal receiving power, reference signal receiving quality and signal-to-interference-plus-noise ratio; determining the switching priority of each adjacent region according to the moving track, so that the switching priority of the adjacent region which is more consistent with the moving track is higher; determining a target cell from the neighbor cell list based on the switching priority; and switching the user equipment to the target cell.
According to an embodiment of the present application, the neighbor list is a candidate neighbor list that is initially selected according to a handover condition.
According to an embodiment of the present application, determining a moving trajectory of a user equipment based on a variation amplitude of a measured value of each neighboring cell in a neighboring cell list in unit time includes: and determining the moving track of the user equipment based on the variation amplitude of the N measured values of each neighboring cell in the neighboring cell list in unit time, wherein N is a natural number which is more than or equal to 2.
According to an embodiment of the present application, determining a moving trajectory of a user equipment based on a variation range of N measured values of each neighboring cell in a neighboring cell list in unit time includes: obtaining each measurement value in N times of historical measurement values of each neighboring cell in a neighboring cell list; calculating to obtain the change rate of the N times of historical measurement values; and determining the moving track of the user equipment according to the change rate of the N times of historical measurement values.
According to an embodiment of the present application, determining a handover priority of each neighboring cell according to a movement trajectory includes: obtaining N switching priorities of each adjacent cell according to the change rate of the N historical measurement values used for predicting the movement track; and performing addition or weighted average calculation on the N switching priorities to obtain the switching priority of each adjacent region.
According to an embodiment of the present application, before determining a moving trajectory of a user equipment based on a variation width per unit time of N number of history measurement values of each neighboring cell in a neighboring cell list, the method further includes: and controlling the user equipment to perform N times of regular measurement on each neighbor cell in the neighbor cell list, and receiving and recording a measurement value returned by the user equipment to obtain N times of historical measurement values.
According to an embodiment of the present application, before determining a moving trajectory of a user equipment based on a variation width per unit time of N number of history measurement values of each neighboring cell in a neighboring cell list, the method further includes: and controlling the user equipment to perform N times of regular measurement on each neighbor cell in the neighbor cell list according to the measurement value measurement conditions, and receiving and recording the measurement value returned by the user equipment to obtain N times of historical measurement values.
According to a second aspect of embodiments herein, an apparatus for cell handover, the apparatus comprising: the user equipment moving track prediction module is used for determining the moving track of the user equipment based on the change amplitude of the measured value of each adjacent cell in the adjacent cell list in unit time; the switching priority determining module is used for determining the switching priority of each adjacent region according to the moving track, so that the switching priority of the adjacent region which is more consistent with the moving track is higher; a target cell determining module, configured to determine a target cell from a neighbor cell list based on the handover priority; and the cell switching module is used for switching the user equipment to the target cell.
According to a third aspect of an embodiment of the present application, a cell switching system includes: a base station for performing any of the above cell switching methods; and the user equipment is used for responding to the instruction sent by the base station.
According to a fourth aspect of embodiments of the present application, a computer-readable storage medium has a computer program stored therein, and the computer program is executed by a processor to implement any one of the cell handover methods described above.
The embodiment of the application provides a cell switching method, a device, a system and a storage medium, wherein the method comprises the following steps: firstly, determining a moving track of the user equipment based on the variation amplitude of a measured value (such as reference signal received power, reference signal received quality or signal-to-interference-plus-noise ratio) of each adjacent cell in the adjacent cell list in unit time; then, determining the switching priority of each adjacent cell according to the moving track, so that the switching priority of the adjacent cell which is more consistent with the moving track is higher; and then, determining a target cell from the neighbor cell list based on the switching priority and switching the user equipment to the target cell. Therefore, the adjacent cell which is consistent with the movement track prediction can be selected as the target cell for switching, so that the transition adjacent cell which only passes through a short time in the moving process is avoided, the switching rate of the cell is greatly reduced, the success rate of cell switching is correspondingly improved, the signaling overhead is reduced, and the continuity and the stability of the service of the user equipment are ensured.
It is to be understood that the implementation of the present application does not require all of the above-described advantages to be achieved, but rather that certain technical solutions may achieve certain technical effects, and that other embodiments of the present application may also achieve other advantages not mentioned above.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
in the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
Fig. 1 is a schematic diagram of a basic cell handover process;
FIG. 2 is a schematic diagram of a UE moving path and a cell structure;
fig. 3 is a schematic diagram illustrating an implementation flow of a cell handover method according to an embodiment of the present application;
fig. 4 is a schematic diagram illustrating an implementation flow of another embodiment of the cell handover method of the present application;
fig. 5 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present application.
Detailed Description
In order to make the objects, features and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, cell handover refers to channel switching that is required when a user equipment moves from one cell (which refers to a base station or the coverage area of a base station) to another cell in order to maintain uninterrupted communication for the mobile user. Fig. 1 shows a basic flow of cell handover, for example, the user equipment 101 shown in fig. 1 may always detect the signal quality of the neighboring cell in the communication process, execute operation S110, and detect whether the neighboring cell meets the handover condition; when there is an adjacent cell satisfying the handover condition (for example, the signal carrier level is lower than the threshold level), the ue 101 performs operation S120 to send an adjacent cell Measurement information (Measurement Report message) to the base station 102 (ENB); after receiving the Measurement Report message, the base station 102 executes operation S130, acquires neighbor cell Measurement information, determines a target cell, and starts a handover procedure; then, the base station 102 executes operation S140 to issue RRC connection reconfiguration information (RRCReconfiguration message) to the user equipment 101; after receiving the rrcreeconfiguration message, the user equipment 101 performs operation S150, receives the RRC connection reconfiguration information, and performs RRC connection reconfiguration; after the RRC connection reconfiguration is completed, the user equipment 101 performs operation S160 to notify the base station 102 that the RRC connection reconfiguration is completed (sends an rrcconfigurationcomplete message). Thus, the handover procedure of the cell is completed.
The cell handover method of the present application is mainly applied to the base station 102, and particularly relates to a specific method for determining a target cell in operation S130. In the existing solution, when determining a target cell, a cell with the best signal value is often selected as the target cell according to a state of a user equipment measurement time. However, this method does not consider the moving track of the user equipment, and it is likely that the user equipment just switches to the target cell and triggers a new cell switch. For example, in the cell structure diagram shown in fig. 2, if the ue moves from point a of the cell 202 to point B of the cell 201 along the moving path shown by the dotted line, because of the approach to the cell 203, two cell handovers may be performed in a short time, that is, the handover from the cell 202 to the cell 203 is performed first, and then the handover from the cell 203 to the cell 201 has to be performed soon.
In the cell handover method provided in the embodiment of the present application, before cell handover, a moving trajectory of the user equipment is first determined according to a variation amplitude of some measured values of a signal in a unit time, and then a target cell is determined according to a predicted moving trajectory to perform handover. For example, when the movement locus of the user is predicted to be directed to the cell 201 instead of the cell 203, the cell 201 is directly determined as the target cell. Therefore, only one switching is needed, namely the cell 202 is directly switched to the cell 201, so that the switching rate of the cell is greatly reduced, the success rate of cell switching is greatly improved, the signaling overhead is reduced, and the continuity and stability of the user equipment service are ensured.
Specifically, fig. 3 shows an implementation procedure of an embodiment of the cell handover method of the present application. Referring to fig. 3, the method mainly comprises: step S310, determining a movement track of the user equipment based on a variation amplitude of a measurement value of each neighboring cell in the neighboring cell list in unit time, wherein the measurement value comprises at least one of Reference Signal Receiving Power (RSRP), reference Signal Receiving Quality (RSRQ), and Signal-to-interference-plus-NOISE RATIO (Signal-to-NOISE RATIO); step S320, determining the switching priority of each adjacent region according to the moving track, so that the switching priority of the adjacent region which is more consistent with the moving track is higher; step S330, determining a target cell from the neighbor cell list based on the switching priority; step S340, the user equipment is switched to the target cell.
As mentioned above, before cell handover, the ue always obtains the measurement value of each neighboring cell to detect the signal quality of the neighboring cell, where the commonly used measurement values include: reference signal received power, reference signal received quality, or signal to interference plus noise ratio. The communication index for measuring the strength and quality of the signal is often changed along with the movement of the user equipment; thus, the present inventors have creatively conceived that the movement trajectory of the user equipment can be inversely predicted according to the change amplitude (e.g., change rate) of the communication index per unit time, and once the movement trajectory of the user equipment is predicted, the target cell can be determined by the movement trajectory.
Based on the above inventive concept, in step S310, after receiving the measured value of each neighboring cell in the neighboring cell list sent by the user equipment, the embodiment of the present application further determines the moving trajectory of the user equipment based on the variation amplitude of the measured value of each neighboring cell in the neighboring cell list in unit time, which is a step that is not present in the existing scheme.
The measurement value of each neighbor cell may be a measurement value commonly used in the existing scheme, and includes at least one of a reference signal received power, a reference signal received quality, and a signal-to-interference-plus-noise ratio. Therefore, additional functions can be realized without introducing other communication indexes, and the realization difficulty is greatly simplified.
The change amplitude of the measured value in unit time can be calculated by calculating the change quantity of the two measured values in unit time; calculating the quotient of the two measured values in unit time; or the function difference of the two previous and next measurements in unit time, etc.
For example,
or the like, or, alternatively,
or the like, or, alternatively,
wherein, the first and the second end of the pipe are connected with each other,
V measured value (a) (n) is the change rate of the nth measurement value of the cell a;
the measured value (a) (n) is the nth measured value of the cell a;
the measured value (a) (n-1) is the measured value of the nth-1 time of the cell a;
t (a) is the time interval from the n-1 st measurement to the n measurement of the cell a.
Wherein the content of the first and second substances,
if the measured value of the cell a is detected regularly, T (a) is a fixed value; if, on an irregular basis, for example, the measurement value is acquired only when the cell switching condition is met, T (a) is calculated from the measurement time of the (n-1) th measurement and the measurement time of the (n) th measurement.
It should be noted that, the determination of the user equipment movement track in step 310 does not necessarily need to obtain a movement track composed of continuous points with directions and coordinates, and may also obtain only any measurement index that can indicate a movement trend. For example: speed of movement, change in direction of movement, acceleration of movement, and the like.
Once the movement trajectory of the user equipment is determined through step 320, the handover priority of each neighbor cell may be determined according to the movement trajectory such that the neighbor cell corresponding to the movement trajectory is higher in priority in operation S320. The cell corresponding to the movement track is often a neighboring cell to which the movement track of the user equipment is directed, or a neighboring cell that indicates that the user equipment is approaching at a high speed through various indexes.
Thereafter, the target cell may be determined based on the handover priority through step S330. Generally, when a target cell is determined based on a handover priority, a neighboring cell with the highest handover priority, that is, a neighboring cell that more conforms to a movement trajectory, is selected as the target cell. However, if it is found that the handover rate of the neighbor cell with the highest handover priority is lower than that of the neighbor cell with the second highest priority according to some statistical probability or error analysis, it is also possible to use the neighbor cell with the second highest priority as the target cell. The cell switching method of the present application is not limited, and the implementer can flexibly determine the cell switching method according to the implementation effect.
After the target cell is determined, the user equipment may be handed over to the target cell via step S340. The operations performed in step S340 mainly include operation S140 shown in fig. 1 and operations S150 and S160 performed after the user equipment receives the RRC connection reconfiguration information.
It can be seen that, in the cell handover method provided in this embodiment, first, before cell handover, a moving trajectory of the user equipment is determined based on a variation amplitude of a measurement value of each neighboring cell in the neighboring cell list in unit time through step S310; then, determining the switching priority of each neighboring cell according to the moving track through step S320, so that the switching priority of the neighboring cell that is more consistent with the moving track is higher; then, based on the switching priority, the S330 takes the neighboring cell with higher switching priority in the neighboring cell list as the target cell, and the step S340 switches the ue to the target cell.
Therefore, the adjacent cell which is consistent with the moving track of the user equipment can be selected as the target cell for switching, so that the transition adjacent cell which is only passed through for a short time in the moving process is avoided, the switching rate of the cell is greatly reduced, the success rate of cell switching is correspondingly improved, the signaling overhead is reduced, and the continuity and the stability of the service of the user equipment are ensured.
It should be noted that the embodiment shown in fig. 3 is only one of the most basic embodiments of the cell handover method of the present application, and further refinement and extension can be performed by an implementer on the basis of the embodiment.
According to an embodiment of the present application, the neighbor cell list is a candidate neighbor cell list that is initially selected according to a handover condition.
Usually, the neighbor cell list sent by the user equipment is not screened, and if all neighbor cells in the neighbor cell list are used as candidate neighbor cells, the calculation amount is large; in addition, the target neighboring cell that matches the moving trajectory of the ue first needs to satisfy the handover condition, and if the neighboring cell matches the moving trajectory, but is far away from the current location of the ue or has poor signal quality, the neighboring cell is handed over to the target neighboring cell, which may cause a dropped call or affect the call quality.
Therefore, in the embodiment, before the user movement track or the target cell is determined, the neighbor cell list is screened according to the cell switching condition, and the neighbor cells which do not meet the cell switching condition are removed. Therefore, the problem that the call is disconnected or the call quality cannot be guaranteed is solved, the calculated amount can be greatly reduced, the processing efficiency is improved, and the processing time is shortened.
The cell handover condition may be a cell handover condition already used in an existing scheme, for example: when the signal carrier level is lower than a threshold level (e.g., -100 dBm), performing a handover; when the carrier-to-interference ratio is lower than a given value, cutting is carried out; when the distance is greater than a given value, a switch is made, and so on.
According to an embodiment of the present application, determining a moving trajectory of a user equipment based on a variation amplitude of a measured value of each neighboring cell in a neighboring cell list in unit time includes: and determining the moving track of the user equipment based on the variation amplitude of the N measured values of each neighboring cell in the neighboring cell list in unit time, wherein N is a natural number which is more than or equal to 2.
In this embodiment, the change of the measurement value of each neighboring cell is not directly sent by the ue, but calculated according to N times of measurement values of each neighboring cell. Therefore, the user equipment does not need to carry out additional processing, is transparent to the user equipment, and can greatly simplify the operation of the user equipment end.
According to an embodiment of the present application, determining a moving trajectory of a user equipment based on a variation range of N measured values of each neighboring cell in a neighboring cell list in unit time includes: obtaining each measurement value in N times of historical measurement values of each neighboring cell in a neighboring cell list; calculating to obtain the change rate of the N times of historical measurement values; and determining the moving track of the user equipment according to the change rate of the N times of historical measurement values.
In this embodiment, the change rate refers to the ratio of the change of the measured value to the change of the measured value with time, and is calculated by using the following formula:
for the description of related variables, please refer to the foregoing, and detailed description is omitted here.
Generally, the larger the change rate of the measurement value is, the more the mobile device is approaching the cell, so this embodiment may be implemented by calculating the change rate of the measurement value when determining the moving track of the user equipment based on the change amplitude of the measurement value of each neighboring cell in the neighboring cell list in unit time.
According to an embodiment of the present application, determining a handover priority of each neighboring cell according to a movement trajectory includes: obtaining N switching priorities of each adjacent cell according to the change rate of the N historical measurement values used for predicting the movement track; and performing addition or weighted average calculation on the N switching priorities to obtain the switching priority of each adjacent region.
Since the movement is a continuous process, if the switching priority corresponding to the change of the measurement values of the last two times is only taken, the deviation is always existed, and only a trend of a short time can be reflected.
Therefore, in the method of the present invention, more history records are obtained, and N times of handover priorities are calculated, and the handover priorities of each neighboring cell are obtained by performing addition or weighted average calculation on the N times of handover priorities, so that the determined ue movement trajectory is closer to the actual movement trajectory.
According to an embodiment of the present application, before determining a moving trajectory of a user equipment based on a variation width per unit time of N number of history measurement values of each neighboring cell in a neighboring cell list, the method further includes: and controlling the user equipment to perform N times of regular measurement on each neighbor cell in the neighbor cell list, and receiving and recording a measurement value returned by the user equipment to obtain N times of historical measurement values.
In this embodiment, the user equipment is controlled by configuration or message to perform periodic measurement on each neighboring cell in the neighboring cell list, and the measurement value returned by the user equipment is periodically received and recorded to obtain N-time historical measurement values.
In recording the measurements returned by the user device, the measurements returned by the user device may be stored in a local data storage system, such as a database, file system, or LDAP server.
Therefore, the interval time of the measurement values of every two times is uniform, the calculation difficulty is reduced, and the movement track of the user equipment determined based on the change of the measurement values is closer to the actual movement track.
According to an embodiment of the present application, before determining a moving trajectory of a user equipment based on a variation width per unit time of N number of history measurement values of each neighboring cell in a neighboring cell list, the method further includes: and controlling the user equipment to perform N times of regular measurement on each neighbor cell in the neighbor cell list according to the measurement value measurement conditions, and receiving and recording the measurement value returned by the user equipment to obtain N times of historical measurement values.
In this embodiment, the ue sends the latest measurement of each neighboring cell through the MeasurementReport message only when the measurement value meets some measurement conditions, for example, meets the cell handover condition.
Therefore, the received measurement is irregular, and the interval time of every two measurement values is different, so that the communication times can be greatly reduced, and the occupation of communication bandwidth can be reduced.
It should be noted that the above implementation of the embodiment of the present application is only an exemplary illustration of the refinement and expansion on the basis of the basic embodiment shown in fig. 3. The above embodiments may be flexibly combined into new embodiments by the implementers according to specific implementation requirements and implementation conditions.
Fig. 4 shows another specific embodiment of the cell handover method according to the present application, which mainly performs the following steps when performing cell handover:
step S410, acquiring a neighbor cell list reported by user equipment and a measured value of each neighbor cell, and taking the neighbor cells meeting the switching condition as an alternative neighbor cell list;
step S420, calculating the measured value change rate of each cell in the alternative neighbor cell list for N times in the past;
step S430, sorting the change rate of the cells in the candidate cell list from big to small in the past N measurement periods, and setting the priority according to the sorting sequence, wherein the sum of the past N second priorities is the switching priority of the cell;
when the priority is set according to the sequencing sequence, the priority can be set according to the change rate of the measured value, wherein the larger the change rate of the measured value is, the closer the terminal is to the cell is, the higher the corresponding priority is; if there is a cell with a change rate less than 0, indicating that the terminal is far away from the cell, the cell may be removed from the candidate list.
Assuming that P (a) (N) is the priority of the cell a in the nth measurement period, the following formula can be used when the sum of the past N priorities of the cell is the handover priority P (a) of the cell: p (a) = P (a) (0) + P (a) (1) + … + P (a) (n);
step S440, select the cell with the highest handover priority in the candidate cell list as the handover target cell for handover.
Therefore, in the embodiment, the moving track of the user equipment is estimated by using the change rate of the cell measurement signal value, and the adjacent cell conforming to the moving track of the user equipment is selected as the target cell to be switched, so that the situation that the user equipment is switched to a transition cell for multiple times is avoided, and the switching success rate and the service quality are greatly improved.
It should be noted that the embodiment shown in fig. 4 is only an exemplary illustration of the cell handover method of the present application, and is not limited to the embodiment and the application scenario of the cell handover method of the present application. The implementer may adopt any applicable implementation mode and apply to any applicable application scenario according to specific implementation conditions.
Further, the embodiment of the present application also provides a cell switching apparatus. As shown in fig. 5, the apparatus 50 includes: a user equipment movement track prediction module 501, configured to determine a user equipment movement track based on a variation amplitude of a measured value of each neighboring cell in a neighboring cell list in unit time; a switching priority determining module 502, configured to determine a switching priority of each neighboring cell according to the moving trajectory, so that the switching priority of the neighboring cell that is more consistent with the moving trajectory is higher; a target cell determining module 503, configured to determine a target cell from the neighbor cell list based on the handover priority; a cell handover module 504, configured to handover the user equipment to the target cell.
According to an embodiment of the present application, the ue movement trajectory prediction module 501 is specifically configured to determine a ue movement trajectory based on a variation amplitude of N measured values of each neighboring cell in a neighboring cell list in unit time, where N is a natural number greater than or equal to 2.
According to an embodiment of the present application, the user equipment movement trajectory prediction module 501 includes: the measured value collecting submodule is used for obtaining each measured value in the N times of historical measured values of each adjacent cell in the adjacent cell list; the change rate calculation submodule is used for calculating the change rate of the N times of historical measurement values; and the user equipment moving track prediction sub-module is used for determining the moving track of the user equipment according to the change rate of the N times of historical measurement values.
According to an embodiment of the present application, the switching priority determining module 502 includes: the N-time switching priority obtaining submodule is used for obtaining N-time switching priorities of each adjacent region according to the change rate of the N-time historical measurement values used for predicting the movement track; and the switching priority determining submodule is used for performing addition or weighted average calculation on the N switching priorities to obtain the switching priority of each adjacent cell.
According to an embodiment of the present application, the apparatus 50 further includes: and the measurement value acquisition module is used for controlling the user equipment to perform N times of regular measurement on each neighbor cell in the neighbor cell list, and receiving and recording the measurement value returned by the user equipment to obtain N times of historical measurement values.
According to an embodiment of the present application, the measured value obtaining module is specifically configured to control the user equipment to perform N-time periodic measurement on each neighboring cell in the neighboring cell list according to a measured value measurement condition, and receive and record a measured value returned by the user equipment to obtain N-time historical measured values.
According to a third aspect of an embodiment of the present application, a cell switching system includes: a base station for performing any of the above cell switching methods; and the user equipment is used for responding to the instruction sent by the base station.
According to a fourth aspect of embodiments of the present application, a computer-readable storage medium has a computer program stored therein, and the computer program is executed by a processor to implement any one of the cell handover methods described above.
Here, it should be noted that: the above description on the embodiment of the cell switching apparatus, the above description on the embodiment of the cell switching system, and the above description on the embodiment of the computer storage medium are similar to the description on the foregoing method embodiments, and have similar beneficial effects to the foregoing method embodiments, and therefore, no further description is given. For technical details that are not disclosed yet in the description of the embodiment of the cell switching apparatus, the description of the embodiment of the cell switching system, and the description of the embodiment of the computer storage medium, please refer to the description of the foregoing method embodiments of the present application for understanding, and therefore, for brevity, will not be described again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of a unit is only one logical function division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another device, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps of implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer-readable storage medium, and when executed, executes the steps including the method embodiments; and the aforementioned storage medium includes: various media capable of storing program codes, such as a removable storage medium, a Read Only Memory (ROM), a magnetic disk, and an optical disk.
Alternatively, the integrated units described above in the present application may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present application or portions thereof that contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a removable storage medium, a ROM, a magnetic disk, an optical disk, or the like.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method of cell handover, the method comprising:
determining a moving track of the user equipment based on a variation amplitude of a measured value of each neighboring cell in a neighboring cell list in unit time, wherein the measured value comprises at least one of reference signal received power, reference signal received quality and signal-to-interference-plus-noise ratio, the variation amplitude of the measured value in unit time comprises a variation of two previous and next measured values in unit time, a quotient of the two previous and next measured values in unit time or a function difference of the two previous and next measured values in unit time, and the moving track of the user equipment is used for determining a neighboring cell to which the moving track of the user equipment points or a neighboring cell to which the user equipment is approaching at a high speed;
determining the switching priority of each adjacent region according to the moving track, so that the switching priority of the adjacent region which is more consistent with the moving track is higher;
determining a target cell from the neighbor cell list based on the handover priority;
and switching the user equipment to the target cell.
2. The method of claim 1, wherein the neighbor list is a candidate neighbor list initially selected according to a handover condition.
3. The method of claim 1, the determining a user equipment movement trajectory based on a magnitude of change per unit time of measurements for each neighbor in a neighbor list, comprising:
and determining the moving track of the user equipment based on the variation amplitude of the N measured values of each neighboring cell in the neighboring cell list in unit time, wherein N is a natural number which is more than or equal to 2.
4. The method of claim 3, the determining a user equipment movement trajectory based on a magnitude of change per unit time of N measurements for each neighbor in a neighbor list, comprising:
obtaining each measurement value in the N times of historical measurement values of each neighboring cell in the neighboring cell list;
calculating to obtain the change rate of the N times of historical measurement values;
and determining the moving track of the user equipment according to the change rate of the N times of historical measurement values.
5. The method of claim 4, the determining a handover priority for each neighbor according to the movement trajectory, comprising:
obtaining N times of switching priorities of each adjacent cell according to the change rate of the N times of historical measurement values used for predicting the moving track;
and performing addition or weighted average calculation on the N switching priorities to obtain the switching priority of each adjacent region.
6. The method of claim 3, prior to said determining a user equipment movement trajectory based on a magnitude of change per unit time of N historical measurements for each neighbor in a neighbor list, the method further comprising:
and controlling the user equipment to perform N times of regular measurement on each neighboring cell in the neighboring cell list, and receiving and recording a measurement value returned by the user equipment to obtain N times of historical measurement values.
7. The method of claim 3, prior to said determining a user equipment movement trajectory based on a magnitude of change per unit time of N number of historical measurements for each neighbor in a neighbor list, further comprising:
and controlling the user equipment to perform N times of regular measurement on each neighbor cell in the neighbor cell list according to measurement value measurement conditions, and receiving and recording a measurement value returned by the user equipment to obtain N times of historical measurement values.
8. An apparatus for cell switching, the apparatus comprising:
a user equipment movement track prediction module, configured to determine a user equipment movement track based on a variation amplitude of a measurement value of each neighboring cell in a neighboring cell list in unit time, where the measurement value includes at least one of reference signal received power, reference signal received quality, and signal-to-interference-plus-noise ratio, the variation amplitude of the measurement value in unit time includes a variation of two previous and next measurement values in unit time, a quotient of the two previous and next measurement values in unit time, or a function difference of the two previous and next measurement values in unit time, and the user equipment movement track is used to determine a neighboring cell to which the user equipment movement track points or a neighboring cell to which the user equipment is approaching at a high speed;
a switching priority determining module, configured to determine a switching priority of each neighboring cell according to the movement trajectory, so that the switching priority of the neighboring cell that is more consistent with the movement trajectory is higher;
a target cell determining module, configured to determine a target cell from the neighbor cell list based on the handover priority;
and the cell switching module is used for switching the user equipment to the target cell.
9. A system for cell switching, the system comprising:
a base station for performing the cell handover method of any one of claims 1 to 7;
and the user equipment is used for responding to the instruction sent by the base station.
10. A computer-readable storage medium, having stored therein a computer program which, when executed by a processor, implements the method of any of claims 1-7.
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