CN112449393B - Cell switching method and terminal - Google Patents
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Abstract
The invention provides a cell switching method and a terminal, wherein the method comprises the following steps: the method comprises the steps of obtaining signal intensity samples of signal intensity of a serving cell and signal intensity of a target cell, determining a serving cell prediction function for predicting the signal intensity of the serving cell and a target cell prediction function for predicting the signal intensity of the target cell according to the samples and a preset function, and when the signal intensity of the target cell meets a switching threshold, if the signal intensity of the serving cell obtained according to the serving cell prediction function is smaller than the signal intensity of the target cell obtained according to the target cell prediction function, judging that cell switching is carried out by a terminal. According to the invention, the reference signal intensity before the switching trigger is subjected to data analysis, and the change trend of the reference signal intensity after the switching moment and the change trend of the reference signal intensity after the switching are predicted by using the preset function of the reference signal intensity change, so that the switching judgment is intervened, the false switching caused by the reference signal mutation is effectively avoided, and the ping-pong switching is inhibited.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a cell switching method and a terminal.
Background
In a wireless communication system, when a terminal is at the edge of a serving cell, the signal strength of a neighboring cell increases due to the weakening of the signal strength of the serving cell. When the strength of the reference signal of the adjacent cell is greater than the strength of the reference signal of the serving cell, and the difference between the strength of the reference signal of the serving cell and the strength of the reference signal of the target cell is greater than or equal to a preset difference set by a switching threshold, the terminal reports a measurement report, and a base station of the serving cell performs cell switching according to the measurement report. However, as the coverage of the cell edge is weak, the fluctuation of the quality of the coverage signal is large, and the ping-pong handover phenomenon is easy to occur, so that the terminal is frequently switched between two cells or a plurality of cells, and the data transmission quality is affected.
The prior art mainly suppresses ping-pong handover by adjusting handover parameters. For example, cell handover may be performed when the difference between the reference signal strength of the original target cell and the reference signal strength of the serving cell is greater than or equal to 5 dB. By increasing the preset difference value set by the switching threshold from 5dB to 10dB, the cell switching can be carried out only when the difference value between the reference signal intensity of the target cell and the reference signal intensity of the serving cell is greater than or equal to 10dB, the switching condition is improved, the sensitivity of the cell switching is reduced, and the ping-pong switching is restrained.
However, in the prior art, if the preset difference in the handover threshold is set too high, the frequency of the terminal cell handover is reduced, and the normal handover function of the terminal is affected.
Disclosure of Invention
The invention aims to provide a cell switching method and a terminal so as to inhibit a ping-pong switching phenomenon of the terminal.
In a first aspect, a cell handover method of the present invention includes:
when a target cell is identified, if the monitored reference signal strength of a serving cell is equal to the reference signal strength of the target cell, respectively monitoring and storing a first sample set of the serving cell and a second sample set of the target cell according to a preset frequency, wherein the first sample set comprises a preset number of reference signal strengths of the serving cell, and the second sample set comprises a preset number of reference signal strengths of the target cell;
determining a first coefficient set according to all reference signal strengths in the first sample set and a preset function, and determining a second coefficient set according to all reference signal strengths in the second sample set and the preset function, wherein the preset function is used for obtaining the cell reference signal strength at any moment;
determining a first prediction function according to the preset function and the first coefficient set, and determining a second prediction function according to the preset function and the second coefficient set, where the first prediction function and the second prediction function are respectively used for predicting the serving cell reference signal strength and the target cell reference signal strength;
and if the reference signal strength of the target cell meets a cell switching threshold, determining a first prediction reference signal strength of the serving cell according to the first prediction function, determining a second prediction reference signal strength of the target cell according to the second prediction function, and if the second prediction reference signal strength is greater than the first prediction reference signal strength, switching the network from the serving cell to the target cell.
In a possible design, if the monitored reference signal strength of the serving cell is equal to the reference signal strength of the target cell, the monitoring and storing the first sample set of the serving cell and the second sample set of the target cell according to a preset frequency respectively includes:
taking the time when the monitored reference signal strength of the serving cell and the monitored reference signal strength of the target cell are equal for the first time as a sampling starting time;
and monitoring and storing the reference signal strength of the serving cell in a preset time period according to the preset frequency from the sampling starting moment, taking all the reference signal strengths of the serving cell as a first sample set, monitoring and storing the reference signal strength of the target cell in the preset time period according to the preset frequency, and taking all the reference signal strengths of the target cell as a second sample set.
In one possible design, the determining a first set of coefficients according to all reference signal strengths in the first set of samples and a preset function includes:
if the preset number is N, inputting N reference signal intensities in the first sample set and a moment when the reference signal intensity of the monitored serving cell is equal to the reference signal intensity of the target cell for the first time into the preset function to obtain a first N-order equation, wherein N is a positive integer;
and solving a first coefficient set according to the first Nth order equation.
In one possible design, the determining the second set of coefficients according to all reference signal strengths in the second set of samples and the preset function includes:
if the preset number is N, inputting N reference signal intensities in the second sample set and a moment when the reference signal intensity of the serving cell and the reference signal intensity of the target cell are monitored to be equal for the first time into the preset function to obtain a second N-order equation, wherein N is a positive integer;
and solving according to the second Nth order equation to obtain a second coefficient set.
In one possible design, the reference signal strength of the target cell satisfying a cell handover threshold includes:
the reference signal strength of the target cell is greater than the reference signal strength of the serving cell, and the difference between the reference signal strength of the serving cell and the reference signal strength of the target cell is greater than or equal to a preset threshold.
In one possible design, before the identifying the target cell, the method further includes:
and if a plurality of adjacent cells are identified simultaneously, taking the adjacent cell with the maximum reference signal strength as a target cell.
In one possible design, the reference signal strength is a reference signal level value received by the terminal.
In a second aspect, an embodiment of the present invention provides a cell switching apparatus, including:
a determining module, configured to, when a target cell is identified, if a monitored reference signal strength of a serving cell is equal to a reference signal strength of the target cell, monitor and store a first sample set of the serving cell and a second sample set of the target cell according to a preset frequency, respectively, where the first sample set includes a preset number of reference signal strengths of the serving cell, and the second sample set includes a preset number of reference signal strengths of the target cell; determining a first coefficient set according to all reference signal strengths in the first sample set and a preset function, and determining a second coefficient set according to all reference signal strengths in the second sample set and the preset function, wherein the preset function is used for obtaining the cell reference signal strength at any moment; determining a first prediction function according to the preset function and the first coefficient set, and determining a second prediction function according to the preset function and the second coefficient set, where the first prediction function and the second prediction function are respectively used for predicting the serving cell reference signal strength and the target cell reference signal strength;
a handover module, configured to determine a first predicted reference signal strength of the serving cell according to the first prediction function if the reference signal strength of the target cell meets a cell handover threshold, determine a second predicted reference signal strength of the target cell according to the second prediction function, and handover the network from the serving cell to the target cell if the second predicted reference signal strength is greater than the first predicted reference signal strength.
In a third aspect, an embodiment of the present invention provides a terminal, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executes computer-executable instructions stored by the memory to cause the at least one processor to perform the cell handover method of any one of the first aspects.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer executes instructions, and when a processor executes the computer executes the instructions, the cell handover method according to any one of the first aspect is implemented.
According to the cell switching method and the terminal provided by the embodiment of the invention, the reference signal strength before the switching trigger is subjected to data analysis, the preset function of the reference signal strength change is utilized to predict the switching time and the change trends of the reference signal strength of the serving cell and the target cell after the switching, and then the switching judgment is intervened to determine whether the switching is to be completed or not, so that the occurrence of the ping-pong switching is inhibited.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a block diagram of a wireless communication system according to an embodiment of the present invention;
fig. 2 is a first flowchart of a cell handover method according to an embodiment of the present invention;
fig. 3 is a flowchart of a cell switching method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
With the above figures, certain embodiments of the invention have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.
Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention. As shown in fig. 1, the network system includes a plurality of base stations 11 and a plurality of user terminals 12. The cell is an area providing wireless communication services for users, and is a basic unit of a wireless network, and the base station 11 is configured to manage or support one or more cells, where generally one base station corresponds to one cell, that is, a cell is a coverage area centered around the base station. When the terminal 12 is in the range of the wireless signal provided by the serving cell, it establishes a connection with the base station managing the serving cell and then establishes communication with the core network, thereby implementing a wireless communication service. In a wireless communication system, when a terminal is located at the edge of a serving cell, the signal quality of the serving cell becomes weak, the signal quality of an adjacent cell becomes strong, the terminal is triggered to report a measurement report, and a serving base station can judge whether to perform cell switching according to the measurement report, that is, channel switching between the terminal and the base station is completed.
In the cell switching process, when the terminal leaves the serving cell and enters the target cell for switching, along with the weakening of the serving cell and the enhancement of the target cell, the base station corresponding to the weakened serving cell signal triggers the switching process, so that the terminal is switched to the target cell. However, the coverage at the edge of the cell is weak, the fluctuation of the coverage signal strength is large, and the ping-pong handover phenomenon is easily caused, so that the terminal is frequently switched between the serving cell and the target cell or among a plurality of cells, and the data transmission quality is affected. In order to realize the ping-pong handover inhibition, the prior art inhibits the ping-pong handover by raising the handover threshold. However, the method for suppressing ping-pong handover in the prior art may affect the normal handover function of the terminal and affect the user experience.
In order to avoid the technical problem, the invention improves the cell switching method based on the scene. The method comprises the steps of monitoring the signal intensity of a serving cell and the signal intensity of a target cell to be switched, obtaining a signal intensity sample of the signal intensity of the serving cell and the signal intensity sample of the signal intensity of the target cell when the reference signal intensity of the serving cell is equal to the reference signal intensity of the target cell, obtaining a serving cell prediction function for predicting the signal intensity of the serving cell and a target cell prediction function for predicting the signal intensity of the target cell according to the samples and a preset function, and when the signal intensity of the target cell meets a switching threshold, if the signal intensity of the serving cell obtained according to the serving cell prediction function is smaller than the signal intensity of the target cell obtained according to the target cell prediction function, judging that cell switching is carried out by a terminal. According to the invention, the reference signal intensity before the switching trigger is subjected to data analysis, the preset function of the reference signal intensity change is utilized to predict the switching moment and the change trend of the reference signal intensity after the switching, and then the switching judgment is intervened to determine whether the switching is to be completed or not, so that the occurrence of the reciprocating ping-pong switching is inhibited.
Fig. 2 is a first flowchart of a cell handover method according to an embodiment of the present invention. The execution subject of the method of this embodiment may be the terminal in fig. 1, as shown in fig. 2, the cell switching method includes the following steps:
s201: when the target cell is identified, if the monitored reference signal strength of the serving cell is equal to the reference signal strength of the target cell, respectively monitoring and storing a first sample set of the serving cell and a second sample set of the target cell according to a preset frequency, wherein the first sample set comprises the reference signal strengths of a preset number of serving cells, and the second sample set comprises the reference signal strengths of a preset number of target cells.
In the embodiment of the invention, when the terminal identifies the signals of the adjacent cells at the edge of the serving cell, the terminal determines whether to perform handover according to the reference signal strength of the adjacent cells. In one possible implementation, if the terminal identifies multiple neighboring cells simultaneously, the neighboring cell with the highest reference signal strength is used as the target cell.
When the terminal identifies the target cell, the reference signal strength of the serving cell and the target cell starts to be monitored according to the preset frequency. An exemplary preset frequency may be set to monitor once per second. If the reference signal strength of the serving cell is equal to the reference signal strength of the target cell, it indicates that the terminal is far away from the center of the base station of the serving cell and is closer to the base station of the target cell to be switched. At this time, the terminal monitors and stores a first sample set of serving cells and a second sample set of target cells, wherein the first sample set includes reference signal strengths of a preset number of serving cells, and the second sample set includes reference signal strengths of a preset number of target cells. For example, the preset number may be 200, that is, the first sample set includes 200 reference signal strengths of serving cells, and the 200 reference signal strengths are analyzed according to a time sequence, so that a variation trend of the reference signal strength of the serving cell in which the terminal is located may be preliminarily estimated, and the variation trend of the reference signal strength of the serving cell is consistent with a wireless network quality trend of the serving cell. Similarly, the second sample set includes 200 reference signal strengths of the serving cell, and the 200 reference signal strengths are analyzed according to the time sequence, so that the reference signal strength variation trend of the target cell can be preliminarily estimated, and the reference signal strength variation trend of the target cell is consistent with the wireless network quality variation trend of the target cell.
S202: and determining a first coefficient set according to all reference signal strengths in the first sample set and a preset function, and determining a second coefficient set according to all reference signal strengths in the second sample set and the preset function, wherein the preset function is used for obtaining the cell reference signal strength at any moment.
In the embodiment of the present invention, the preset function is used to obtain the cell reference signal strength at any time, that is, the time-domain variation of the cell reference signal strength can be obtained through the preset function. The variation trend of the cell reference signal strength can be set to be different by setting the coefficients in the preset function. After the first sample set is obtained, the preset number of reference signal strengths in the first sample set represents the reference signal strength variation trend of the serving cell, so that the first coefficient set can be determined according to all the reference signal strengths in the first sample set and the preset function, and the first coefficient set represents the reference signal strength variation trend of the serving cell. Similarly, after the first sample set is obtained, a second coefficient set is determined according to all reference signal strengths in the second sample set and the preset function, and the second coefficient set reflects the reference signal strength variation trend of the target cell.
S203: and determining a first prediction function according to the preset function and the first coefficient set, and determining a second prediction function according to the preset function and the second coefficient set, wherein the first prediction function and the second prediction function are respectively used for predicting the reference signal strength of the serving cell and the reference signal strength of the target cell.
In the embodiment of the invention, after a first coefficient set representing the variation trend of the reference signal strength of the serving cell is obtained, a first prediction function is determined according to a preset function and the first coefficient set, and the first prediction function is used for predicting the reference signal strength of the serving cell. If the reference signal strength of the serving cell obtained according to the first prediction function is smaller and smaller with time, it indicates that the terminal is farther and farther from the base station of the serving cell. Namely, the serving cell reference signal strength predicted by the first prediction function can reflect the variation trend of the serving cell reference signal strength.
In the embodiment of the invention, after the second coefficient set representing the variation trend of the reference signal strength of the target cell is obtained, a second prediction function is determined according to the preset function and the second coefficient set, and the second prediction function is used for predicting the reference signal strength of the target cell. If the reference signal strength of the target cell obtained according to the second prediction function is larger along with the time, it indicates that the terminal is closer to the base station of the target cell. Or, if the reference signal strength of the target cell obtained according to the second prediction function has no obvious variation trend or has a sudden change, it indicates that the terminal may have a ping-pong handover problem after being handed over to the target cell. The serving cell reference signal strength predicted by the second prediction function can reflect the change trend of the target cell reference signal strength, and the change trend of the target cell reference signal strength can avoid the ping-pong handover phenomenon.
S204: and if the reference signal strength of the target cell meets the cell switching threshold, determining a first prediction reference signal strength of the serving cell according to a first prediction function, determining a second prediction reference signal strength of the target cell according to a second prediction function, and if the second prediction reference signal strength is greater than the first prediction reference signal strength, switching the network from the serving cell to the target cell.
In one possible implementation manner, when the reference signal strength of the target cell meets the cell handover threshold, the reference signal strength of the target cell is greater than the reference signal strength of the serving cell, and a difference between the reference signal strength of the serving cell and the reference signal strength of the target cell is greater than or equal to a preset threshold, the reference signal strength of the target cell meets the cell handover threshold.
In the embodiment of the present invention, when the reference signal strength of the target cell meets the cell handover threshold, a first prediction reference signal strength of the serving cell is determined according to a first prediction function, and a second prediction reference signal strength of the target cell is determined according to a second prediction function. If the second predicted reference signal strength is greater than the first predicted reference signal strength, the terminal is the best switching point, and the terminal reports a measurement report to the serving cell and switches the signal from the serving cell to the target cell.
As can be seen from the foregoing embodiments, a signal strength sample of a signal strength of a serving cell and a signal strength sample of a signal strength of a target cell are obtained, a signal strength prediction function of a predicted serving cell is obtained according to the signal strength sample of the serving cell and a preset function, and a signal strength prediction function of the predicted target cell is obtained according to the signal strength sample of the target cell and the preset function. According to the invention, the reference signal intensity before the switching trigger is subjected to data analysis, the preset function of the reference signal intensity change is utilized to predict the switching moment and the change trend of the reference signal intensity after the switching, and then the switching judgment is intervened to determine whether the switching is to be completed, so that the false switching caused by the reference signal mutation is effectively avoided, and the ping-pong switching is inhibited.
Fig. 3 is a flowchart of a cell switching method according to a second embodiment of the present invention. When the reference signal strength is set to the reference signal level value received by the terminal, as shown in fig. 3, the cell switching method includes the following steps:
s301: when a target cell is identified, taking the moment when the monitored reference signal strength of the serving cell is equal to the reference signal strength of the target cell for the first time as a sampling starting moment; and monitoring and storing the reference signal strength of the serving cell in a preset time period according to a preset frequency from the sampling starting moment, taking all the reference signal strengths of the serving cell as a first sample set, monitoring and storing the reference signal strength of the target cell in the preset time period according to the preset frequency, and taking all the reference signal strengths of the target cell as a second sample set. The first sample set includes reference signal strengths of a predetermined number of serving cells, and the second sample set includes reference signal strengths of a predetermined number of target cells.
In the embodiment of the invention, when the terminal identifies the target cell, the reference signal strengths of the serving cell and the target cell are monitored. When the terminal identifies the target cell, the terminal starts to monitor the reference signal strength of the serving cell and the target cell. Specifically, the terminal starts to monitor the received serving cell reference signal level value and the target cell reference signal level value. And when the monitored reference signal strength of the serving cell is equal to the reference signal strength of the target cell for the first time, taking the monitored reference signal strength as a sampling starting moment. And starting from the sampling starting moment, monitoring and storing the reference signal strength of the serving cell in a preset time period according to a preset frequency, taking all the reference signal strengths of the serving cell as a first sample set, monitoring and storing the reference signal strength of the target cell in the preset time period according to the preset frequency, and taking all the reference signal strengths of the target cell as a second sample set. The first set of samples includes signal strength parameters of a predetermined number of serving cells, and the second set of samples includes signal strength parameters of a predetermined number of target cells.
S3021: if the preset number is N, inputting N reference signal intensities in the first sample set and the time when the reference signal intensity of the serving cell and the reference signal intensity of the target cell are monitored to be equal for the first time into a preset function to obtain a first N-order equation, wherein N is a positive integer; and solving a first coefficient set according to a first N-order equation, wherein the preset function is used for obtaining the cell reference signal strength at any moment.
In the embodiment of the present invention, the preset function is set as shown in formula (1):
wherein f (t) is the signal strength parameter of N serving cells, t 0 Is the sampling initial time.
In the embodiment of the invention, the time when the reference signal strength of the serving cell and the reference signal strength of the target cell are monitored to be equal for the first time is set as the initial sampling time t 0 . If the preset number is N, that is, the first sample set includes the signal strength parameters of N serving cells, the signal strength parameters of the N serving cells and the initial sampling time t are set 0 Inputting a preset function formula (1) to obtain a first N-order equation. For example, the predetermined number is 100, and the signal strength parameters f (t) of the N serving cells in the first sample set are f s1 ，f s2 ，f s3 ……f s99 ，f s100 The initial sampling time is t 0 Then f will be s1 ，f s2 ，f s3 ……f s99 ，f s100 And t 0 Substituting into equation (1) generates a first N-th order equation containing N equations. Obtaining a first set of coefficients f by solving a first Nth order equation s (t 0 )，f′ s (t 0 )，...f s (n) (t 0 )，f s (n+1) (ξ)。
S3022: if the preset number is N, inputting N reference signal intensities in the second sample set and the moment when the reference signal intensity of the serving cell and the reference signal intensity of the target cell are monitored to be equal for the first time into a preset function to obtain a second N-order equation; and solving according to a second Nth order equation to obtain a second coefficient set.
In the inventionIn the embodiment, the preset function is set as shown in formula (1), and the time when the monitored reference signal strength of the serving cell and the monitored reference signal strength of the target cell are equal to each other for the first time is set as the initial sampling time t 0 . If the preset number is N, that is, the second sample set includes the signal strength parameters of N target cells, the signal strength parameters of the N target cells and the sampling initial time t are used 0 And inputting the preset function formula (1) to obtain a second Nth order equation. For example, the preset number is 100, and the signal strength parameters f (t) of the N target cells in the second sample set are f (t), respectively d1 ，f d2 ，f d3 ……f d99 ，f d100 The initial sampling time is t 0 Then f will be d1 ，f d2 ，f d3 ……f d99 ，f d100 Substituting into formula (1) to generate a second N-order equation of N equations, and solving the second N-order equation to obtain a second coefficient set f d (t 0 )，f′ d (t 0 )，...f d (n) (t 0 )，f d (n+1) (ξ)。
S303: and determining a first prediction function according to the preset function and the first coefficient set, and determining a second prediction function according to the preset function and the second coefficient set, wherein the first prediction function and the second prediction function are respectively used for predicting the reference signal strength of the serving cell and the reference signal strength of the target cell.
In the embodiment of the present invention, the first prediction function f is obtained by replacing the coefficients in formula (1) with the first coefficient set s (t) wherein f s (t) As shown in (2):
in the embodiment of the present invention, replacing the coefficients in formula (1) with the second coefficient set obtains the second prediction function f d (t) wherein f d (t) As shown in (3):
s304: and if the reference signal strength of the target cell meets the cell switching threshold, determining a first prediction reference signal strength of the serving cell according to a first prediction function, determining a second prediction reference signal strength of the target cell according to a second prediction function, and if the second prediction reference signal strength is greater than the first prediction reference signal strength, switching the signal from the serving cell to the target cell.
This step is consistent with the technical solution described in S204 in the embodiment of fig. 2, and is not described herein again.
It can be known from the foregoing embodiments that reference signal strength samples of sufficient sample amounts are obtained by monitoring the reference signal strengths of the serving cell and the target cell, and a prediction function of the reference signal strengths of the serving cell and the target cell is determined according to the reference signal strength samples, and a change trend of the reference signal strength at the time of handover and after handover is predicted, so as to intervene in handover decision, determine whether to complete the handover, effectively avoid false handover caused by a sudden change of the reference signal, and further suppress ping-pong handover.
Fig. 4 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention. As shown in fig. 4, the cell switching apparatus includes: a determination module 401 and a switching module 402. The determining module 401 is configured to, when a target cell is identified, monitor and store a first sample set of the serving cell and a second sample set of the target cell if the monitored reference signal strength of the serving cell is equal to the reference signal strength of the target cell, where the first sample set includes a preset number of reference signal strengths of the serving cells, and the second sample set includes a preset number of reference signal strengths of the target cell; determining a first coefficient set according to all reference signal strengths in the first sample set and a preset function, and determining a second coefficient set according to all reference signal strengths in the second sample set and the preset function, wherein the preset function is used for obtaining the cell reference signal strength at any moment; determining a first prediction function according to the preset function and the first coefficient set, and determining a second prediction function according to the preset function and the second coefficient set, wherein the first prediction function and the second prediction function are respectively used for predicting the serving cell reference signal strength and the target cell reference signal strength; a switching module 402, configured to determine a first predicted reference signal strength of the serving cell according to the first prediction function and determine a second predicted reference signal strength of the target cell according to the second prediction function if the reference signal strength of the target cell meets a cell switching threshold, and switch the network from the serving cell to the target cell if the second predicted reference signal strength is greater than the first predicted reference signal strength.
In this embodiment, the communication service provisioning apparatus may adopt the method in the embodiment shown in fig. 2, and the technical solution and the technical effect thereof are similar and will not be described herein again.
In an embodiment of the present invention, the determining module 401 is further specifically configured to: taking the time when the monitored reference signal strength of the serving cell and the monitored reference signal strength of the target cell are equal for the first time as a sampling starting time; and monitoring and storing the reference signal strength of the serving cell in a preset time period according to the preset frequency from the sampling starting moment, taking all the reference signal strengths of the serving cell as a first sample set, monitoring and storing the reference signal strength of the target cell in the preset time period according to the preset frequency, and taking all the reference signal strengths of the target cell as a second sample set.
In an embodiment of the present invention, the determining module 401 is further specifically configured to: if the preset number is N, inputting N reference signal intensities in the first sample set and a moment when the reference signal intensity of the serving cell and the reference signal intensity of the target cell are monitored to be equal for the first time into the preset function to obtain a first N-order equation, wherein N is a positive integer; and solving a first coefficient set according to the first Nth order equation.
In an embodiment of the present invention, the determining module 401 is further specifically configured to: if the preset number is N, inputting N reference signal intensities in the second sample set and a moment when the reference signal intensity of the serving cell and the reference signal intensity of the target cell are monitored to be equal for the first time into the preset function to obtain a second N-order equation, wherein N is a positive integer; and solving according to the second Nth order equation to obtain a second coefficient set.
The apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention. As shown in fig. 5, the terminal of the present embodiment includes: a processor 501, a memory 502 and a computer program stored in the memory 502 and operable on the processor 501, the processor 501 implementing the following steps when executing the computer program: when a target cell is identified, if the monitored reference signal strength of a serving cell is equal to the reference signal strength of the target cell, respectively monitoring and storing a first sample set of the serving cell and a second sample set of the target cell according to a preset frequency, wherein the first sample set comprises a preset number of reference signal strengths of the serving cell, and the second sample set comprises a preset number of reference signal strengths of the target cell; determining a first coefficient set according to all reference signal strengths in the first sample set and a preset function, and determining a second coefficient set according to all reference signal strengths in the second sample set and the preset function, wherein the preset function is used for obtaining the cell reference signal strength at any moment; determining a first prediction function according to the preset function and the first coefficient set, and determining a second prediction function according to the preset function and the second coefficient set, where the first prediction function and the second prediction function are respectively used for predicting the serving cell reference signal strength and the target cell reference signal strength; and if the reference signal strength of the target cell meets a cell switching threshold, determining a first prediction reference signal strength of the serving cell according to the first prediction function, determining a second prediction reference signal strength of the target cell according to the second prediction function, and if the second prediction reference signal strength is greater than the first prediction reference signal strength, switching the network from the serving cell to the target cell.
In one possible design, the processor 501, when executing the computer program, further performs the following steps: taking the time when the monitored reference signal strength of the serving cell and the monitored reference signal strength of the target cell are equal for the first time as a sampling starting time; and monitoring and storing the reference signal strength of the serving cell in a preset time period according to the preset frequency from the sampling starting moment, taking all the reference signal strengths of the serving cell as a first sample set, monitoring and storing the reference signal strength of the target cell in the preset time period according to the preset frequency, and taking all the reference signal strengths of the target cell as a second sample set.
In one possible design, the processor 501, when executing the computer program, further implements the following steps: if the preset number is N, inputting N reference signal intensities in the first sample set and the time when the reference signal intensity of the serving cell and the reference signal intensity of the target cell are monitored to be equal to each other into the preset function to obtain a first N-order equation, wherein N is a positive integer; and solving a first coefficient set according to the first Nth order equation.
In one possible design, the processor 501, when executing the computer program, further performs the following steps: if the preset number is N, inputting N reference signal intensities in the second sample set and a moment when the reference signal intensity of the monitored serving cell is equal to the reference signal intensity of the target cell for the first time into the preset function to obtain a second N-order equation, wherein N is a positive integer; and solving according to the second Nth order equation to obtain a second coefficient set.
Reference may be made in particular to the description relating to the method embodiments described above.
In one possible design, memory 502 may be separate or integrated with processor 501.
When the memory 502 is provided separately, the terminal further comprises a bus 503 for connecting said memory 502 and the processor 501.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the cell handover method as described above is implemented.
In the several embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to implement the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware mode, and can also be realized in a mode of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor to execute some steps of the methods described in the embodiments of the present application.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (Extended Industry Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of cell handover, comprising:
when a target cell is identified, if the monitored reference signal strength of a serving cell is equal to the reference signal strength of the target cell, respectively monitoring and storing a first sample set of the serving cell and a second sample set of the target cell according to a preset frequency, wherein the first sample set comprises a preset number of reference signal strengths of the serving cell, and the second sample set comprises a preset number of reference signal strengths of the target cell;
determining a first coefficient set according to all reference signal strengths in the first sample set and a preset function, and determining a second coefficient set according to all reference signal strengths in the second sample set and the preset function, wherein the preset function is used for obtaining the cell reference signal strength at any moment;
determining a first prediction function according to the preset function and the first coefficient set, and determining a second prediction function according to the preset function and the second coefficient set, where the first prediction function and the second prediction function are respectively used for predicting the serving cell reference signal strength and the target cell reference signal strength;
and if the reference signal strength of the target cell meets a cell switching threshold, determining a first prediction reference signal strength of the serving cell according to the first prediction function, determining a second prediction reference signal strength of the target cell according to the second prediction function, and if the second prediction reference signal strength is greater than the first prediction reference signal strength, switching the network from the serving cell to the target cell.
2. The method of claim 1, wherein the monitoring and storing the first set of samples of the serving cell and the second set of samples of the target cell according to a predetermined frequency if the monitored reference signal strength of the serving cell and the monitored reference signal strength of the target cell are equal comprises:
taking the time when the monitored reference signal strength of the serving cell and the monitored reference signal strength of the target cell are equal for the first time as a sampling starting time;
and monitoring and storing the reference signal strength of the serving cell in a preset time period according to the preset frequency from the sampling starting moment, taking all the reference signal strengths of the serving cell as a first sample set, monitoring and storing the reference signal strength of the target cell in the preset time period according to the preset frequency, and taking all the reference signal strengths of the target cell as a second sample set.
3. The method of claim 1, wherein determining the first set of coefficients according to all reference signal strengths in the first set of samples and a preset function comprises:
if the preset number is N, inputting N reference signal intensities in the first sample set and the time when the reference signal intensity of the serving cell and the reference signal intensity of the target cell are monitored to be equal to each other into the preset function to obtain a first N-order equation, wherein N is a positive integer;
and solving a first coefficient set according to the first Nth order equation.
4. The method of claim 1, wherein determining the second set of coefficients according to all reference signal strengths in the second set of samples and the preset function comprises:
if the preset number is N, inputting N reference signal intensities in the second sample set and the time when the reference signal intensity of the serving cell and the reference signal intensity of the target cell are monitored to be equal to each other into the preset function to obtain a second N-order equation, wherein N is a positive integer;
and solving according to the second Nth order equation to obtain a second coefficient set.
5. The method of claim 1, wherein the reference signal strength of the target cell satisfies a cell handover threshold, comprising:
the reference signal strength of the target cell is greater than the reference signal strength of the serving cell, and the difference between the reference signal strength of the serving cell and the reference signal strength of the target cell is greater than or equal to a preset threshold.
6. The method of claim 1, wherein prior to said identifying the target cell, further comprising:
and if a plurality of adjacent cells are identified simultaneously, taking the adjacent cell with the maximum reference signal strength as a target cell.
7. The method of any of claims 1 to 6, wherein the reference signal strength is a reference signal level value received by the terminal.
8. A cell switching apparatus, comprising:
a determining module, configured to, when a target cell is identified, if a monitored reference signal strength of a serving cell is equal to a monitored reference signal strength of the target cell, monitor and store a first sample set of the serving cell and a second sample set of the target cell according to a preset frequency, respectively, where the first sample set includes a preset number of reference signal strengths of the serving cells, and the second sample set includes a preset number of reference signal strengths of the target cell; determining a first coefficient set according to all reference signal strengths in the first sample set and a preset function, and determining a second coefficient set according to all reference signal strengths in the second sample set and the preset function, wherein the preset function is used for obtaining the cell reference signal strength at any moment; determining a first prediction function according to the preset function and the first coefficient set, and determining a second prediction function according to the preset function and the second coefficient set, where the first prediction function and the second prediction function are respectively used for predicting the serving cell reference signal strength and the target cell reference signal strength;
a handover module, configured to determine a first predicted reference signal strength of the serving cell according to the first prediction function if the reference signal strength of the target cell meets a cell handover threshold, determine a second predicted reference signal strength of the target cell according to the second prediction function, and handover the network from the serving cell to the target cell if the second predicted reference signal strength is greater than the first predicted reference signal strength.
9. A terminal, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the memory stored computer-executable instructions causes the at least one processor to perform the cell handover method of any one of claims 1 to 7.
10. A computer-readable storage medium having stored thereon computer-executable instructions which, when executed by a processor, implement the cell handover method of any one of claims 1 to 7.
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| CN115499884A (en) * | 2021-06-18 | 2022-12-20 | 中国移动通信集团浙江有限公司 | Cell service migration method and device and computer readable storage medium |
| WO2023011371A1 (en) * | 2021-07-31 | 2023-02-09 | Huawei Technologies Co., Ltd. | Method and system for configuring a threshold value for a handover parameter of a wireless communication system |
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| US8520630B2 (en) * | 2008-11-17 | 2013-08-27 | Wichorus, Inc. | Method and apparatus for predicting handover in wireless communication network |
| CN102711167B (en) * | 2012-05-25 | 2015-07-22 | 中兴通讯股份有限公司 | Method for measuring reference signal between UE (user equipment) and base station and base station |
| CN102740335A (en) * | 2012-06-13 | 2012-10-17 | 北京邮电大学 | Self-optimizing method for switching femtocell network |
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