CN114258040B

CN114258040B - Method and device for selecting reconstruction target cell, storage medium and terminal

Info

Publication number: CN114258040B
Application number: CN202011005491.0A
Authority: CN
Inventors: 杨恩浩; 谭舒; 周巧成
Original assignee: Unisoc Chongqing Technology Co Ltd
Current assignee: Unisoc Chongqing Technology Co Ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2023-10-27
Anticipated expiration: 2040-09-22
Also published as: CN114258040A

Abstract

A method and a device for selecting a reconstruction target cell, a storage medium and a terminal are provided, wherein the method comprises the following steps: determining a plurality of reconstruction candidate target cells; determining the reconstruction sequence of the plurality of reconstruction candidate target cells according to the signal quality parameters and the signal strength parameters of each reconstruction candidate target cell; and reconstructing at least one part of the plurality of reconstruction candidate target cells according to the reconstruction sequence of the plurality of reconstruction candidate target cells until the reconstruction is successful. The invention can restrict the access signal strength and the signal quality of the reconstructed candidate target cell, and balance the conflict between the access time and the access performance.

Description

Method and device for selecting reconstruction target cell, storage medium and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for selecting a target cell for reconstruction, a storage medium, and a terminal.

Background

Along with increasingly obvious application scene differentiation of consumers, the mobile terminal realizes acceleration of two polarization trends of cost difference, and the application requirements of the mobile terminal are also increasingly subdivided: from the viewpoint of implementation cost, mobile terminals can be generally divided into high-cost terminals and low-cost terminals, and in order to achieve better user experience, the high-cost terminals generally adopt more complex and better-performance RF devices, and baseband chips with more complex demodulation schemes and stronger bottom layer resolution capability; low cost terminals, due to their relatively low requirements for transmission quality and transmission fault tolerance, typically employ relatively simple RF devices, while being limited to the baseband processor capability limit employed, are unlikely to employ complex demodulation schemes, which also determine their relatively low underlying resolution capability, which, in the following description, may be directly mapped for ease of presentation.

From the aspect of terminal application requirements, mobile terminals can be generally classified into two application requirement modes, one is that the transmission rate is extremely pursued, the transmission rate is expected to be as high as possible in unit time, and the transmission quality at any moment is not excessively required, for example, a cloud transmission module of a real-time monitoring system, and in the following description, we refer to the mobile terminal application mode as rate priority, and the limitation is made that the signal transmission rate of a cell which is successfully rebuilt needs to be greater than a preset rate.

The other is that the transmission quality is extremely required, and the type of terminal has higher requirement on the transmission quality on the basis of a certain guarantee of the transmission rate, for example, a voice communication module, in the following description, we call the transmission quality as a priority application scenario of signal transmission quality, and the limitation is made that the signal transmission quality parameter of a cell which is successfully reconstructed needs to be greater than a preset transmission quality threshold, wherein the signal transmission quality parameter can be, for example, a signal quality parameter Sinr, a signal to noise ratio or other suitable parameters.

However, in the prior art, these costs, application appeal differentiated terminals coexist in any possible location of the same network, and due to the huge network management optimization costs for operators, a cell network is typically configured with a set of mobility management parameters. This tends to cause the set of network parameters of a cell to be different for different cost differences, and for terminals with different application requirements.

What is needed is a method for selecting a reconstructed target cell, which can constrain the access signal strength and the signal quality of a reconstructed candidate target cell, and balance the conflict between the access time and the access performance.

Disclosure of Invention

The invention solves the technical problem of providing a selection method and device, a storage medium and a terminal for reconstructing a target cell, which can restrict the access signal strength and the signal quality of a candidate reconstructed target cell and realize the balance of the conflict between the access time and the access performance.

In order to solve the above technical problems, an embodiment of the present invention provides a method for selecting a reconstructed target cell, including the following steps: determining a plurality of reconstruction candidate target cells; determining the reconstruction sequence of the plurality of reconstruction candidate target cells according to the signal quality parameters and the signal strength parameters of each reconstruction candidate target cell; and reconstructing at least one part of the plurality of reconstruction candidate target cells according to the reconstruction sequence of the plurality of reconstruction candidate target cells until the reconstruction is successful.

Optionally, determining the plurality of reconstruction candidate target cells includes: determining whether a neighbor list exists, and measuring signal quality parameters and signal strength parameters of at least a part of neighbor cells in the neighbor list; and if the signal quality parameters and the signal strength parameters of at least one part of the neighbor cells in the neighbor cell list are measured, adopting the measured at least one part of the neighbor cells as the reconstruction candidate target cell.

Optionally, determining the reconstruction sequence of the plurality of reconstruction candidate target cells according to the signal quality parameter and the signal strength parameter of each reconstruction candidate target cell includes: determining a quality impact weight for indicating an impact of the signal quality parameter on the reconstructed power, and determining a strength impact weight for indicating an impact of the signal strength parameter on the reconstructed power; and determining the reconstruction sequence according to a weighted summation value for each reconstruction candidate target cell, wherein the weighted summation value is a signal quality parameter multiplied by a quality influence weight multiplied by a signal strength parameter multiplied by a strength influence weight.

Optionally, for each reconstruction candidate target cell, determining the reconstruction sequence according to the weighted sum value includes: determining that the signal transmission rate of the cell which is successfully reconstructed needs to be larger than a preset rate; determining each reconstruction candidate target cell with the signal strength parameter being greater than or equal to a preset strength threshold; the following formula is used to determine the reconstructed composite value:

wherein I is _i Reconstruction synthesis value for representing an ith reconstruction candidate target cell, sinr _i Signal quality parameter for representing the ith re-establishment candidate target cell, RSRP _i Signal strength parameter for representing ith reconstructed candidate target cell, measPRB _i Measurement bandwidth for representing the ith reconstruction candidate target cell, dlSubFrame _i The method comprises the steps of representing the number of downlink samples which can be used by an ith reconstruction candidate target cell in unit time, wherein Factor1 is used for representing quality influence weights, factor2 is used for representing strength influence weights, and Factor3 is used for representing bandwidth influence weights of the measured bandwidth on reconstruction power; and sequencing the reconstruction comprehensive values of the plurality of reconstruction candidate target cells from large to small to obtain the reconstruction sequence.

Optionally, before sorting the reconstruction synthesis values of the plurality of reconstruction candidate target cells from large to small to obtain the reconstruction sequence, the method for selecting a reconstruction target cell further includes: determining a reconstruction candidate target cell with the minimum signal quality parameter from the reconstruction candidate target cells with the signal strength parameter smaller than the preset strength threshold; determining a reconstruction comprehensive value of each reconstruction candidate target cell with the signal strength parameter smaller than the preset strength threshold by adopting the following formula:

I _j ＝Sinr _min ×Factor1+RSRP _j ×Factor2+10×lg(6/100)

wherein I is _j Reconstruction synthesis value for representing a j-th reconstruction candidate target cell having a signal strength parameter less than the preset strength threshold, sinr _min Signal quality parameter, RSRP, representing the smallest signal quality parameter of the re-establishing candidate target cell _j And the Factor1 is used for representing the quality influence weight, and the Factor2 is used for representing the strength influence weight.

Alternatively, factor1 > Factor3 > Factor2.

Optionally, for each reconstruction candidate target cell, determining the reconstruction sequence according to the weighted sum value includes: determining that the signal transmission quality parameter of the cell which is successfully reconstructed needs to be larger than a preset transmission quality threshold value; determining each reconstruction candidate target cell with the signal strength parameter being greater than or equal to a preset strength threshold; the following formula is used to determine the reconstructed composite value:

wherein I is _i Reconstruction synthesis value for representing an ith reconstruction candidate target cell, sinr _i Signal quality parameter for representing the ith re-establishment candidate target cell, RSRP _i For representing signal strength parameters of the ith reconstruction candidate target cell, factor1 for representing quality impact weight, factor2 for representing strength impact weight; and sequencing the reconstruction comprehensive values of the plurality of reconstruction candidate target cells from large to small to obtain the reconstruction sequence.

I _j ＝Sinr _min ×Factor1+RSRP _j ×Factor2

wherein I is _j Reconstruction synthesis value for representing a reconstruction candidate target cell for which the jth signal strength parameter is less than the preset strength threshold, sinr _min Signal quality parameter, RSRP, representing the smallest signal quality parameter of the re-establishing candidate target cell _j And the Factor1 is used for representing the quality influence weight, and the Factor2 is used for representing the strength influence weight.

Alternatively, factor1 < Factor2.

Optionally, reconstructing at least a portion of the plurality of reconstruction candidate target cells according to a reconstruction sequence of the plurality of reconstruction candidate target cells until the reconstruction is successful includes: determining the traversal sequence of the plurality of reconstruction candidate target cells according to the reconstruction sequence; and determining whether the signal quality parameter of each reconstruction candidate target cell is larger than or equal to a preset quality threshold value in sequence by adopting the traversal sequence, and reconstructing only the reconstruction candidate target cells with the signal quality parameter larger than or equal to the preset quality threshold value until the reconstruction is successful.

Optionally, the reconstructed candidate target cell includes an FDD frequency point cell; determining the traversal order of the plurality of reconstruction candidate target cells according to the reconstruction order comprises: traversing the FDD frequency point cells, determining the FDD frequency point signal quality parameter which is greater than or equal to a first preset FDD frequency point quality threshold value and the FDD frequency point cell with the FDD frequency point signal intensity parameter which is greater than or equal to a first preset FDD frequency point intensity threshold value as a first-stage target cell, wherein the arrangement sequence in the first-stage target cell is determined according to the reconstruction sequence; recording target cells except the first-level target cell in the plurality of reconstruction candidate target cells as second-level target cells, wherein the arrangement sequence inside the second-level target cells is determined according to the reconstruction sequence; determining the traversing order to be the first-level target cell in preference to the second-level target cell.

Optionally, the method for selecting the reconstructed target cell further includes: if the plurality of reconstruction candidate target cells are determined to be not successfully reconstructed, searching other frequency points except the plurality of reconstruction candidate target cells to acquire one or more external candidate target cells; determining a reconstruction sequence of the external candidate target cell; and reconstructing the external candidate target cell according to the reconstruction sequence of the external candidate target cell until the reconstruction is successful.

Optionally, determining the order of reconstruction of the external candidate target cell includes: determining that the signal transmission rate of the cell which is successfully reconstructed needs to be larger than a preset rate; determining PSS power of each external candidate target cell; the PSS power values of the external candidate target cells are sequenced from big to small, so that the power sequence of the external candidate target cells is obtained; and determining the reconstruction sequence of the external candidate target cell according to the power sequence.

Optionally, the external candidate target cell includes an external FDD frequency point cell and an external TDD frequency point cell; determining the reconstruction sequence of the external candidate target cell according to the power sequence comprises: determining a first external TDD frequency point cell and determining external FDD frequency point cells which are sequentially arranged behind the first external TDD frequency point cell; traversing the external FDD frequency point cells which are sequentially arranged behind the first external TDD frequency point cell, and advancing the sequence of the external FDD frequency point cells to the front of the first external TDD frequency point cell if one or more of the following conditions are met: the FDD frequency point signal quality parameter of the external FDD frequency point cell is larger than the preset multiple of the TDD frequency point signal quality parameter of the first external TDD frequency point cell; the FDD frequency point signal quality parameter of the external FDD frequency point cell is greater than or equal to a second preset FDD frequency point quality threshold; and the FDD frequency point signal intensity parameter of the external FDD frequency point cell is greater than or equal to a second preset FDD frequency point intensity threshold value.

Optionally, determining the order of reconstruction of the external candidate target cell includes: determining that the signal transmission quality parameter of the cell which is successfully reconstructed needs to be larger than a preset transmission quality threshold value; determining each external candidate target cell with the signal strength parameter being greater than or equal to a preset strength threshold value: the following formula is used to determine the reconstructed composite value:

wherein I is _k Reconstruction synthesis value for representing kth external candidate target cell, sinr _k Signal quality parameter for representing kth external candidate target cell, RSSI _k For representing the signal strength parameter of the kth external candidate target cell, factor1 for representing the quality impact weight,factor2 is used to represent the intensity impact weight; and sequencing the reconstruction comprehensive values of the plurality of external candidate target cells from large to small to obtain the reconstruction sequence.

Optionally, before sorting the rebuilding integrated values of the plurality of external candidate target cells from large to small to obtain the rebuilding sequence, the method for selecting a rebuilding target cell further includes: determining an external candidate target cell with the minimum signal quality parameter from among the external candidate target cells with the signal strength parameter smaller than the preset strength threshold; determining a reconstruction integrated value of each external candidate target cell with a signal strength parameter smaller than the preset strength threshold by adopting the following formula:

I _p ＝Sinr _min ×Factor1+RSSI _p ×Factor2

Wherein I is _p Reconstruction synthesis value for representing an external candidate target cell with a p-th signal strength parameter less than the preset strength threshold, sinr _min Signal quality parameter, RSSI, for representing the external candidate target cell with the smallest signal quality parameter _p And the Factor1 is used for representing the quality influence weight, and the Factor2 is used for representing the strength influence weight.

To solve the above technical problem, an embodiment of the present invention provides a device for selecting a target cell for reconstruction, including: a cell determining module, configured to determine a plurality of reconstruction candidate target cells; the sequence determining module is used for determining the reconstruction sequence of the plurality of reconstruction candidate target cells according to the signal quality parameter and the signal strength parameter of each reconstruction candidate target cell; and the reconstruction module is used for reconstructing at least one part of the plurality of reconstruction candidate target cells according to the reconstruction sequence of the plurality of reconstruction candidate target cells until the reconstruction is successful.

To solve the above-mentioned technical problem, an embodiment of the present invention provides a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-mentioned method for selecting a rebuilt target cell.

In order to solve the above technical problems, an embodiment of the present invention provides a terminal, including a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of the method for selecting a target cell for reconstruction described above when running the computer program.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, the reconstruction sequence of the plurality of reconstruction candidate target cells is determined by setting the signal quality parameter and the signal strength parameter according to each reconstruction candidate target cell, and the two parameters of the signal quality parameter and the signal strength parameter can be simultaneously considered, so that the access signal strength and the signal quality of the reconstruction candidate target cells are restrained, and the conflict between the access time and the access performance is balanced.

Further, determining a quality influence weight for indicating the influence of the signal quality parameter on the reconstructed power, determining a strength influence weight for indicating the influence of the signal strength parameter on the reconstructed power, then determining the reconstruction sequence according to the weighted sum value for each reconstruction candidate target cell, and realizing the constraint on the access signal strength and the signal quality of the reconstruction candidate target cell under different application scenes by determining the proper quality influence weight and the strength influence weight so as to balance the conflict between the access time and the access performance.

Further, when the signal transmission rate of the cell which is successfully reconstructed needs to be larger than the preset rate, the method is equivalent to considering more parameters which can influence the signal transmission rate for each reconstructed candidate target cell with the signal strength parameter larger than or equal to the preset strength threshold under the application scene of the rate priority terminal.

Furthermore, by setting the Factor1 to be greater than the Factor3 to be greater than the Factor2, the weight occupied by the signal quality parameter can be improved, so that the reconstruction candidate target cell with better transmission quality is further selected under the application scene of the rate priority terminal, and the determined reconstruction sequence can be further enabled to be more in accordance with the actual requirement.

Further, when the signal transmission quality parameter of the cell which is successfully reconstructed needs to be larger than the preset transmission quality threshold value, the method is equivalent to that under the application scene of the quality priority terminal, only parameters affecting the signal transmission quality, namely the signal quality parameter and the signal strength parameter, are considered for each reconstructed candidate target cell of which the signal strength parameter is larger than or equal to the preset strength threshold value, so that the determined reconstruction sequence can be more in accordance with the actual requirement.

Furthermore, by setting the Factor1 to be less than the Factor2, the weight occupied by the signal strength parameter can be improved, so that the reconstruction candidate target cell with better transmission strength is further selected under the application scene of the quality priority terminal, and the determined reconstruction sequence can be further enabled to be more in accordance with the actual requirement.

Further, setting a reconstruction sequence as a traversal sequence of the plurality of reconstruction candidate target cells; and determining whether the signal quality parameter of each reconstruction candidate target cell is larger than or equal to a preset quality threshold value in sequence by adopting the traversal sequence, and reconstructing only the reconstruction candidate target cells with the signal quality parameter larger than or equal to the preset quality threshold value until the reconstruction is successful. By adopting the scheme of the embodiment of the invention, only the reconstruction candidate target cells with better signal quality parameter results can be reconstructed, the invalid reconstruction candidate target cells with worse signal quality parameter results are prevented from being reconstructed, and the reconstruction efficiency is improved on the basis of improving the success rate of reconstruction.

Further, according to the reconstruction sequence, whether the FDD frequency point cells with better signal quality and better signal strength exist or not is determined, the FDD frequency point cells are recorded as first-level target cells, the traversal sequence is determined to be that the first-level target cells are higher than the second-level target cells, and the better FDD frequency point cells can be preferentially adopted for reconstruction, so that the characteristics of abundant service resources and good communication effect of the FDD frequency point cells are utilized, and the communication quality is improved.

Further, if it is determined that none of the plurality of reconstruction candidate target cells is successfully reconstructed, searching other frequency points except the plurality of reconstruction candidate target cells to obtain one or more external candidate target cells, and reconstructing the external candidate target cells according to the reconstruction sequence of the external candidate target cells until the reconstruction is successful, so that the reconstruction success rate can be further improved by searching the external candidate target cells when all cells in a neighbor cell list are unsuitable.

Drawings

Fig. 1 is a flowchart of a method for selecting a target cell for reconstruction in an embodiment of the present invention;

fig. 2 is a flowchart of another method for selecting a target cell for reconstruction in an embodiment of the present invention;

fig. 3 is a partial flowchart of another method for selecting a target cell for reconstruction according to an embodiment of the present invention;

fig. 4 is a partial flowchart of still another method for selecting a target cell for reconstruction according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a selection device for reconstructing a target cell according to an embodiment of the present invention.

Detailed Description

As mentioned before, in the prior art, cost and application appeal differentiated terminals coexist in any possible location of the same network, and a cell network is typically configured with a set of mobility management parameters due to the huge cost of network management optimization for the operators. This tends to cause the set of network parameters of a cell to be different for different cost differences, and for terminals with different application requirements.

The present inventors have studied and found that when a terminal is in a radio resource control (Radio Resource Control, RRC) connected state, if a radio link failure, an integrity protection failure, a handover failure, an RRC reconfiguration failure, etc. occur, the RRC connection will be re-established. In the process of reestablishing and establishing connection, the first operation of all terminals is to find a reestablished target cell, complete the synchronization process with the target cell, and finally complete the system cell reading and access process of the cell based on the synchronization information. For low-cost terminals, in the same network, the reconstruction probability of the low-cost terminals is greatly increased relative to that of the high-cost terminals, so that in order to ensure the user experience, on the premise that the reconstruction probability cannot be reduced, how to ensure the reconstruction success rate and simultaneously shorten the reconstruction time is a great challenge. In addition, how to meet different user requirements in different scenarios to select a reasonable cell residence in the cell selection in the reconstruction process would be another challenge.

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1, fig. 1 is a flowchart of a method for selecting a target cell for reconstruction in an embodiment of the present invention. The selection method of the reconstruction target cell may include steps S11 to S13:

step S11: determining a plurality of reconstruction candidate target cells;

step S12: determining the reconstruction sequence of the plurality of reconstruction candidate target cells according to the signal quality parameters and the signal strength parameters of each reconstruction candidate target cell;

step S13: and reconstructing at least one part of the plurality of reconstruction candidate target cells according to the reconstruction sequence of the plurality of reconstruction candidate target cells until the reconstruction is successful.

In a specific implementation of step S11, determining the plurality of reconstruction candidate target cells may be obtained by determining a neighbor list.

Further, the step of determining a plurality of re-establishment candidate target cells may comprise: determining whether a neighbor list exists, and measuring signal quality parameters and signal strength parameters of at least a part of neighbor cells in the neighbor list; and if the signal quality parameters and the signal strength parameters of at least one part of the neighbor cells in the neighbor cell list are measured, adopting the measured at least one part of the neighbor cells as the reconstruction candidate target cell.

Specifically, based on the reconstruction trigger scene, it may be determined whether there is a reconstruction candidate target cell at this time: if a neighbor list exists before serving cell re-establishment and a corresponding measurement has been made for the neighbor list cell, e.g. whether a signal quality parameter as well as a signal strength parameter has been measured. And if so, taking all the measured neighbor cells as reconstruction candidate target cells during reconstruction. And if the neighbor list does not exist before the service cell is rebuilt or all the neighbor cells do not conduct neighbor cell measurement, the rebuilding triggering time is considered to not exist a rebuilding candidate target cell.

The signal quality parameter may be a signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, sinr) and the signal strength parameter may be a reference signal received power (Reference Signal Receiving Power, RSRP).

In a specific implementation of step S12, the step of determining the reconstruction sequence of the plurality of reconstruction candidate target cells according to the signal quality parameter and the signal strength parameter of each reconstruction candidate target cell may include: determining a quality impact weight for indicating an impact of the signal quality parameter on the reconstructed power, and determining a strength impact weight for indicating an impact of the signal strength parameter on the reconstructed power; and determining the reconstruction sequence according to a weighted summation value for each reconstruction candidate target cell, wherein the weighted summation value is a signal quality parameter multiplied by a quality influence weight multiplied by a signal strength parameter multiplied by a strength influence weight.

In the embodiment of the invention, the access signal strength and the signal quality of the reconstructed candidate target cell can be constrained under different application scenes by determining the proper quality influence weight and the proper strength influence weight, so that the conflict between the access time and the access performance can be balanced.

Further, the reconstruction sequence may be determined in different manners according to whether in the rate-priority terminal application scenario or in the quality-priority terminal application scenario.

It should be noted that, the signal transmission rate depends on the signal quality Sinr of the cell and the number of downlink resources available to the cell, so that the signal quality Sinr and the number of downlink resources can be used as rate priority application scenario related factors; the signal transmission quality depends on the cell signal quality Sinr, and thus can be used as a signal transmission quality priority application scenario-related factor.

However, in practice, the cell signal strength RSRP affects the uplink and downlink access capability and the network side resource decision allocation, and in addition, since the actual power consumption of the terminal is related to the cell signal strength RSRP, since whether the same-frequency and different-frequency measurement task of the network configuration is started is related to the cell signal strength, once the same-frequency and different-frequency measurement task is started, the module power will be greatly increased, especially for some static application terminals, these measurements are not useful consumption to a certain extent, and therefore the cell signal strength RSRP is also used as a scenario-related factor.

Still further, for each reconstruction-candidate target cell, the step of determining the reconstruction sequence from the weighted sum values may comprise: determining that the signal transmission rate of the cell which is successfully reconstructed needs to be larger than a preset rate; determining each reconstruction candidate target cell with the signal strength parameter being greater than or equal to a preset strength threshold; the following formula is used to determine the reconstructed composite value:

It should be noted that by setting 10×lg (MeasPRB _i /100×DlSubFrame _i ) Conversion of the measurement bandwidth into units of signal strength (e.g., DB values) may be implemented.

Specifically, sinr _i RSRP _i The method can be obtained from the measurement information of the terminal neighbor cell; measPRB _i Can be obtained from the reconfiguration information; dlSubFrame _i Different preset values can be configured according to whether the reconstructed candidate target cell is a TDD frequency point cell or an FDD frequency point cell, for example, if TDD is configured to be 2, if FDD is configured to be 10; factor1/Factor2/Factor3 may obtain the configuration based on actual or empirical analysis. The preset strength threshold may be RSRP measurement information corresponding to the uplink transmission capability upper limit of the cell.

In the embodiment of the application, when the signal transmission rate of the cell which is successfully reconstructed needs to be larger than the preset rate, the method is equivalent to considering more parameters which can influence the signal transmission rate for each reconstructed candidate target cell with the signal strength parameter larger than or equal to the preset strength threshold under the application scene of the rate priority terminal.

Still further, before sorting the reconstruction synthesis values of the plurality of reconstruction-candidate target cells from large to small to obtain the reconstruction sequence, the method may further include: determining a reconstruction candidate target cell with the minimum signal quality parameter from the reconstruction candidate target cells with the signal strength parameter smaller than the preset strength threshold; determining a reconstruction comprehensive value of each reconstruction candidate target cell with the signal strength parameter smaller than the preset strength threshold by adopting the following formula:

I _j ＝Sinr _min ×Factor1+RSRP _j ×Factor2+10×lg(6/100)

Further, factor1 > Factor3 > Factor2.

In the embodiment of the invention, the weight occupied by the signal quality parameter can be improved by setting the Factor1 to be more than the Factor3 to be more than the Factor2, so that the reconstruction candidate target cell with better transmission quality is further selected under the application scene of the rate priority terminal, and the determined reconstruction sequence can be further enabled to be more in line with the actual requirement.

In a quality priority terminal application scenario, the reconstruction order may be determined in another way.

Further, for each reconstruction-candidate target cell, determining the reconstruction sequence from the weighted sum values may comprise: determining that the signal transmission quality parameter of the cell which is successfully reconstructed needs to be larger than a preset transmission quality threshold value; determining each reconstruction candidate target cell with the signal strength parameter being greater than or equal to a preset strength threshold; the following formula is used to determine the reconstructed composite value:

Specifically, sinr _i RSRP _i The method can be obtained from the measurement information of the terminal neighbor cell; factor1/Factor2 may obtain the configuration based on measured or empirical analysis. The preset strength threshold may be RSRP measurement information corresponding to the uplink transmission capability upper limit of the cell.

In the embodiment of the invention, when the signal transmission quality parameter of the cell which is successfully reconstructed needs to be larger than the preset transmission quality threshold value, the method and the device are equivalent to that under the application scene of the quality priority terminal, for each reconstructed candidate target cell with the signal strength parameter larger than or equal to the preset strength threshold value, only parameters affecting the signal transmission quality, namely the signal quality parameter and the signal strength parameter are considered, so that the determined reconstruction sequence can more meet the actual requirement.

I _j ＝Sinr _min ×Factor1+RSRP _j ×Factor2

wherein I is _j Reconstruction synthesis value for representing a reconstruction candidate target cell for which the jth signal strength parameter is less than the preset strength threshold, sinr _min For representing the signal quality parameter minimum Signal quality parameters, RSRP, of candidate target cells _j And the Factor1 is used for representing the quality influence weight, and the Factor2 is used for representing the strength influence weight.

Further, factor1 < Factor2.

In the embodiment of the invention, the weight occupied by the signal strength parameter can be improved by setting the Factor1 to be less than the Factor2, so that the reconstruction candidate target cell with better transmission strength is further selected under the application scene of the quality priority terminal, and the determined reconstruction sequence can be further enabled to more accord with the actual requirement.

In a specific embodiment of step S13, the reconstruction sequence of the plurality of reconstruction candidate target cells may be directly adopted, and at least a portion of the plurality of reconstruction candidate target cells may be reconstructed until the reconstruction is successful.

In another specific embodiment, the traversing order of the plurality of reconstruction candidate target cells may be determined according to the reconstructing order, and then at least a part of the plurality of reconstruction candidate target cells is reconstructed by adopting the traversing order until the reconstruction is successful.

Further, reconstructing at least a portion of the plurality of reconstruction candidate target cells according to a reconstruction order of the plurality of reconstruction candidate target cells until the reconstruction is successful may include: determining the traversal sequence of the plurality of reconstruction candidate target cells according to the reconstruction sequence; and determining whether the signal quality parameter of each reconstruction candidate target cell is larger than or equal to a preset quality threshold value in sequence by adopting the traversal sequence, and reconstructing only the reconstruction candidate target cells with the signal quality parameter larger than or equal to the preset quality threshold value until the reconstruction is successful.

In the embodiment of the invention, only the reconstruction candidate target cells with better signal quality parameter results can be reconstructed, the invalid reconstruction candidate target cells with worse signal quality parameter results are prevented from being reconstructed, and the reconstruction efficiency is improved on the basis of improving the reconstruction success rate.

Further, the reconstructed candidate target cell comprises an FDD frequency point cell; determining the traversal order for the plurality of reconstruction-candidate target cells according to the reconstruction order may include: traversing the FDD frequency point cells, determining the FDD frequency point signal quality parameter which is greater than or equal to a first preset FDD frequency point quality threshold value and the FDD frequency point cell with the FDD frequency point signal intensity parameter which is greater than or equal to a first preset FDD frequency point intensity threshold value as a first-stage target cell, wherein the arrangement sequence in the first-stage target cell is determined according to the reconstruction sequence; recording target cells except the first-level target cell in the plurality of reconstruction candidate target cells as second-level target cells, wherein the arrangement sequence inside the second-level target cells is determined according to the reconstruction sequence; determining the traversing order to be the first-level target cell in preference to the second-level target cell.

More specifically, if the FDD frequency point Sinr > the FDD frequency point Sinr threshold and the FDD frequency point RSRP > the RSRP threshold, the series of FDD frequency points may be categorized into a level 1 camping attempt set, and other frequency points that do not satisfy such a relationship may be categorized into a level 2 camping attempt set, where the level 1 set of cells is first tried, and then the cells in set 2 are again tried. The order of residency of the bins in each set is reordered using the measurements.

In the embodiment of the invention, the FDD frequency point cells with better signal quality and better signal strength are determined according to the reconstruction sequence and recorded as the first-level target cells, and the traversal sequence is determined to be higher than the first-level target cells than the second-level target cells, so that the better FDD frequency point cells can be preferentially adopted for reconstruction, and the characteristics of abundant service resources and good communication effect of the FDD frequency point cells are utilized, thereby improving the communication quality.

It should be noted that the above method may be applied in a rate-first terminal application scenario, and in a quality-first terminal application scenario, reestablishing access may be attempted sequentially from large to small according to the size relationship of the cells (rsrp+sinr).

Referring to fig. 2, fig. 2 is a flowchart of another method for selecting a target cell for reconstruction in an embodiment of the present invention. The other selection method of the re-establishment target cell may include steps S21 to S25, each of which will be described below.

In step S21, a plurality of reconstruction candidate target cells are determined.

In step S22, a reconstruction sequence of the plurality of reconstruction-candidate target cells is determined.

In step S23, it is determined whether the signal quality parameter is equal to or greater than a preset quality threshold, if yes, step S24 is continued, and if no, step S25 is performed.

Specifically, since the reconstruction attempt of the invalid cell will increase the reconstruction time length, in order to reduce the reconstruction attempt of the invalid cell, only the cell with a high probability of being able to be successfully reconstructed is subjected to the reconstruction attempt in the existing reconstruction candidate list procedure. The invalid cell re-establishment attempt probability is constrained by a signal quality Sinr threshold (Sinr Th), the larger the value setting, the lower the invalid cell re-establishment probability, thereby saving re-establishment time, but the larger the value setting will also increase the effective re-establishment cell miss re-establishment attempt probability. However, in the tradeoff of "reducing valid reconstruction attempts likely" and "reducing invalid reconstruction attempts likely", the tendency of this step herein is focused on "reducing invalid reconstruction attempts likely".

In step S24, reconstruction is performed.

Specifically, the method can perform the reading of the MIB+SIB1+SIB2 of the reconstructed target candidate cell, and trigger the access process after the reading of the system message is completed. Other SIB reading than SIB1 and SIB2 is accomplished concomitantly with the access procedure and the traffic procedure, and in one embodiment may be accomplished prior to entering the suspension (Idle).

In step S25, each reconstruction-candidate target cell is traversed.

It should be noted that in the process of traversing each reconstruction candidate target cell, the method may end when the reconstruction is successful, or may end after all reconstruction candidate target cells are traversed and the reconstruction fails.

In the embodiment, the steps S21 to S25 are described with reference to the steps in fig. 1, and are not repeated here.

Referring to fig. 3, fig. 3 is a partial flowchart of another method for selecting a target cell for reconstruction according to an embodiment of the present invention. The further method for selecting a re-establishment target cell may include steps S11 to S13 shown in fig. 1, and may further include steps S31 to S33:

step S31: if the plurality of reconstruction candidate target cells are determined to be not successfully reconstructed, searching other frequency points except the plurality of reconstruction candidate target cells to acquire one or more external candidate target cells;

Step S32: determining a reconstruction sequence of the external candidate target cell;

step S33: and reconstructing the external candidate target cell according to the reconstruction sequence of the external candidate target cell until the reconstruction is successful.

In the implementation of step S31, a frequency point searching algorithm or a broadcast control channel allocation table (Broadcast Control Channel, ba) table may be used to obtain a frequency point of a cell that may reside in the location environment.

In the implementation of step S32, the reconstruction sequence may be determined in different manners according to whether in the rate-priority terminal application scenario or in the quality-priority terminal application scenario.

In a specific implementation manner of the embodiment of the present invention, the step of determining the reconstruction sequence of the external candidate target cell may include: determining that the signal transmission rate of the cell which is successfully reconstructed needs to be larger than a preset rate; determining a primary synchronization signal (Primary Synchronization Signal, PSS) power of each external candidate target cell; the PSS power values of the external candidate target cells are sequenced from big to small, so that the power sequence of the external candidate target cells is obtained; and determining the reconstruction sequence of the external candidate target cell according to the power sequence.

Further, the external candidate target cell includes an external Frequency Division Duplex (FDD) Frequency point cell and an external Time Division Duplex (TDD) Frequency point cell; the step of determining a re-establishment order of the external candidate target cell according to the power order may include: determining a first external TDD frequency point cell and determining external FDD frequency point cells which are sequentially arranged behind the first external TDD frequency point cell; traversing the external FDD frequency point cells which are sequentially arranged behind the first external TDD frequency point cell, and advancing the sequence of the external FDD frequency point cells to the front of the first external TDD frequency point cell if one or more of the following conditions are met: the FDD frequency point signal quality parameter of the external FDD frequency point cell is larger than the preset multiple of the TDD frequency point signal quality parameter of the first external TDD frequency point cell; the FDD frequency point signal quality parameter of the external FDD frequency point cell is greater than or equal to a second preset FDD frequency point quality threshold; and the FDD frequency point signal intensity parameter of the external FDD frequency point cell is greater than or equal to a second preset FDD frequency point intensity threshold value.

The PSS position, PSS power and Sinr index corresponding to the PSS corresponding to each frequency point can be obtained by adopting a calculation time domain correlation algorithm.

Specifically, if the terminal application scene is rate priority, firstly using PSS power to sort all frequency points; then, find 1 st TDD frequency point Freqx in all above-mentioned frequency points after PSS power sequencing, carry on the aforesaid judgement to all FDD frequency points Freqy after frequency point Freqx and meet one or more of them, before mentioning frequency point Freqx with frequency point Freqy position, other frequency point order keep unchanged. And iterating the flow until the judgment of all FDD frequency points is completed by traversing.

In another specific implementation manner of the embodiment of the present invention, the terminal application scenario may be signal transmission quality priority.

Further, the step of determining the order of reconstruction of the external candidate target cell may include: determining that the signal transmission quality parameter of the cell which is successfully reconstructed needs to be larger than a preset transmission quality threshold value; determining each external candidate target cell with the signal strength parameter being greater than or equal to a preset strength threshold value: the following formula is used to determine the reconstructed composite value:

wherein I is _k Reconstruction synthesis value for representing kth external candidate target cell, sinr _k Signal quality parameter for representing kth external candidate target cell, RSSI _k For representing signal strength parameters of the kth external candidate target cell, factor1 for representing quality impact weight, factor2 for representing strength impact weight; and sequencing the reconstruction comprehensive values of the plurality of external candidate target cells from large to small to obtain the reconstruction sequence.

It is understood that after PSS synchronization, the signal strength parameter may take the form of a received signal strength indication (Received Signal Strength Indication, RSSI).

Still further, before sorting the reconstructed composite values of the plurality of external candidate target cells from large to small to obtain the reconstruction sequence, the method may further include: determining an external candidate target cell with the minimum signal quality parameter from among the external candidate target cells with the signal strength parameter smaller than the preset strength threshold; determining a reconstruction integrated value of each external candidate target cell with a signal strength parameter smaller than the preset strength threshold by adopting the following formula:

I _p ＝Sinr _min ×Factor1+RSSI _p ×Factor2

wherein I is _p Reconstruction synthesis for an external candidate target cell with a p-th signal strength parameter less than the preset strength thresholdValue of Sinr _min Signal quality parameter, RSSI, for representing the external candidate target cell with the smallest signal quality parameter _p And the Factor1 is used for representing the quality influence weight, and the Factor2 is used for representing the strength influence weight.

In the embodiment of the invention, if the reconstruction candidate target cells are determined to be not successful, other frequency points except the reconstruction candidate target cells are searched to acquire one or more external candidate target cells, and the external candidate target cells are reconstructed according to the reconstruction sequence of the external candidate target cells until the reconstruction is successful, so that the reconstruction success rate can be further improved by searching the external candidate target cells when the cells in the neighbor cell list are not suitable.

Referring to fig. 4, fig. 4 is a partial flowchart of another method for selecting a target cell for reconstruction according to an embodiment of the present invention. The further method for selecting a re-establishment target cell may include steps S21 to S25 shown in fig. 2, and may further include steps S41 to S47, each of which will be described below.

In step S41, other frequency points than the plurality of reconstruction-candidate target cells are searched to acquire one or more external candidate target cells.

In step S42, PSS is synchronized.

Specifically, after PSS synchronization, the PSS synchronization position of the frequency point, the PSS corresponding to the RSSI value, and the PSS corresponding to Sinr can be determined.

In step S43, PSS power of each external candidate target cell is determined.

In step S44, signal quality parameters of the first external TDD frequency point cell and the subsequent external FDD frequency point cell frequency points and signal strength parameters of the subsequent external FDD frequency point cell frequency points are determined.

In step S45, a reconstruction sequence of the external candidate target cell is determined.

Specifically, after determining the reestablishment sequence, reestablishment can be tried, specifically, cell ID estimation and frequency offset estimation can be obtained based on the PSS synchronization positions of each frequency point, and the reading of the reestablishment target candidate cell mib+sib1+sib2 can be sequentially performed, and the access process is triggered after the reading of the system message is completed. Other SIB reading than SIB1 and SIB2 is accomplished concomitantly with the access procedure and the traffic procedure, and in one embodiment may be accomplished prior to entering the suspension (Idle).

In step S46, it is determined whether the reconstruction is successful, and if so, it ends, and if not, step S47 is performed.

In step S47, each of the external candidate target cells is traversed.

In the embodiment, the steps S41 to S47 are described with reference to fig. 1 and 2, and are not repeated here.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a selection device for reconstructing a target cell according to an embodiment of the present invention. The selection device of the reconstruction target cell may include:

a cell determining module 51, configured to determine a plurality of reconstruction candidate target cells;

a sequence determining module 52, configured to determine a reconstruction sequence of the plurality of reconstruction candidate target cells according to the signal quality parameter and the signal strength parameter of each reconstruction candidate target cell;

a reconstruction module 53, configured to reconstruct at least a portion of the plurality of reconstruction candidate target cells according to a reconstruction sequence of the plurality of reconstruction candidate target cells until the reconstruction is successful.

For the principle, specific implementation and advantageous effects of the selection device of the reconstruction target cell, please refer to the related description of the selection method of the reconstruction target cell described above, which is not repeated herein.

The embodiment of the invention also provides a storage medium, on which a computer program is stored, which, when being executed by a processor, performs the steps of the above method. The storage medium may be a computer readable storage medium, and may include, for example, a non-volatile memory (non-volatile) or a non-transitory memory (non-transitory) and may also include an optical disc, a mechanical hard disc, a solid state hard disc, and the like.

Specifically, in the embodiment of the present invention, the processor may be a central processing unit (central processing unit, abbreviated as CPU), and the processor may also be other general purpose processors, digital signal processors (digital signal processor, abbreviated as DSP), application specific integrated circuits (application specific integrated circuit, abbreviated as ASIC), off-the-shelf programmable gate arrays (field programmable gate array, abbreviated as FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically erasable ROM (electrically EPROM, EEPROM), or a flash memory. The volatile memory may be a random access memory (random access memory, RAM for short) which acts as an external cache. By way of example but not limitation, many forms of random access memory (random access memory, abbreviated as RAM) are available, such as static random access memory (static RAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, abbreviated as DDR SDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus random access memory (direct rambus RAM, abbreviated as DR RAM).

The embodiment of the application also provides a terminal which comprises a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor executes the steps of the method when running the computer program. The terminal comprises, but is not limited to, a mobile phone, a computer, a tablet personal computer and other terminal equipment.

Specifically, the terminal in the embodiments of the present application may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal equipment), a wireless communication device, a user agent, or a user apparatus. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc., which the embodiments of the present application are not limited to.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims

1. A method for selecting a reconstructed target cell, comprising the steps of:

determining a plurality of reconstruction candidate target cells;

determining a quality influence weight for indicating the influence of the signal quality parameter on the reconstruction power, and determining a strength influence weight for indicating the influence of the signal strength parameter on the reconstruction power, and determining a reconstruction sequence of the plurality of reconstruction candidate target cells according to a weighted sum value for each reconstruction candidate target cell, wherein the weighted sum value is the signal quality parameter x the quality influence weight + the signal strength parameter x the strength influence weight;

reconstructing at least a part of the plurality of reconstruction candidate target cells according to the reconstruction sequence of the plurality of reconstruction candidate target cells until the reconstruction is successful;

wherein determining a reconstruction sequence of the plurality of reconstruction candidate target cells according to the weighted sum value comprises:

Determining that the signal transmission rate of the cell which is successfully reconstructed needs to be larger than a preset rate;

determining each reconstruction candidate target cell with the signal strength parameter being greater than or equal to a preset strength threshold;

the following formula is used to determine the reconstructed composite value:

wherein I is _i Reconstruction synthesis value for representing an ith reconstruction candidate target cell, sinr _i Signal quality parameter for representing the ith re-establishment candidate target cell, RSRP _i Signal strength parameter for representing ith reconstructed candidate target cell, measPRB _i Measurement bandwidth for representing the ith reconstruction candidate target cell, dlSubFrame _i The method comprises the steps of representing the number of downlink samples which can be used by an ith reconstruction candidate target cell in unit time, wherein Factor1 is used for representing quality influence weights, factor2 is used for representing strength influence weights, and Factor3 is used for representing bandwidth influence weights of the measured bandwidth on reconstruction power;

and sequencing the reconstruction comprehensive values of the plurality of reconstruction candidate target cells from large to small to obtain the reconstruction sequence.

2. The method of selecting a target cell for reconstruction according to claim 1, wherein determining a plurality of candidate target cells for reconstruction comprises:

determining whether a neighbor list exists, and measuring signal quality parameters and signal strength parameters of at least a part of neighbor cells in the neighbor list;

And if the signal quality parameters and the signal strength parameters of at least one part of the neighbor cells in the neighbor cell list are measured, adopting the measured at least one part of the neighbor cells as the reconstruction candidate target cell.

3. The method according to claim 1, further comprising, before sorting the reconstruction integration values of the plurality of reconstruction candidate target cells from large to small to obtain the reconstruction sequence:

determining a reconstruction candidate target cell with the minimum signal quality parameter from the reconstruction candidate target cells with the signal strength parameter smaller than the preset strength threshold;

determining a reconstruction comprehensive value of each reconstruction candidate target cell with the signal strength parameter smaller than the preset strength threshold by adopting the following formula:

I _j ＝Sinr _min ×Factor1+RSRP _j ×Factor2+10×lg(6/100)

4. The method for selecting a rebuilt target cell according to claim 1, wherein Factor1 > Factor3 > Factor2.

5. The method of selecting a reconstruction target cell according to claim 1, wherein determining the reconstruction order from a weighted sum value for each reconstruction candidate target cell comprises:

determining that the signal transmission quality parameter of the cell which is successfully reconstructed needs to be larger than a preset transmission quality threshold value;

the following formula is used to determine the reconstructed composite value:

wherein I is _i Reconstruction synthesis value for representing an ith reconstruction candidate target cell, sinr _i Signal quality parameter for representing the ith re-establishment candidate target cell, RSRP _i For representing signal strength parameters of the ith reconstruction candidate target cell, factor1 for representing quality impact weight, factor2 for representing strength impact weight;

6. The method according to claim 5, further comprising, before sorting the reconstruction integration values of the plurality of reconstruction candidate target cells from large to small to obtain the reconstruction sequence:

I _j ＝Sinr _min ×Factor1+RSRP _j ×Factor2

7. The method for selecting a rebuilt target cell according to claim 5, wherein Factor1 < Factor2.

8. The method according to claim 1, wherein reconstructing at least a portion of the plurality of reconstruction-candidate target cells according to a reconstruction order of the plurality of reconstruction-candidate target cells until the reconstruction is successful comprises:

Determining the traversal sequence of the plurality of reconstruction candidate target cells according to the reconstruction sequence;

and determining whether the signal quality parameter of each reconstruction candidate target cell is larger than or equal to a preset quality threshold value in sequence by adopting the traversal sequence, and reconstructing only the reconstruction candidate target cells with the signal quality parameter larger than or equal to the preset quality threshold value until the reconstruction is successful.

9. The method for selecting a reconstruction target cell according to claim 8, wherein the reconstruction candidate target cell includes an FDD frequency point cell;

determining the traversal order of the plurality of reconstruction candidate target cells according to the reconstruction order comprises:

traversing the FDD frequency point cells, determining the FDD frequency point signal quality parameter which is greater than or equal to a first preset FDD frequency point quality threshold value and the FDD frequency point cell with the FDD frequency point signal intensity parameter which is greater than or equal to a first preset FDD frequency point intensity threshold value as a first-stage target cell, wherein the arrangement sequence in the first-stage target cell is determined according to the reconstruction sequence;

recording target cells except the first-level target cell in the plurality of reconstruction candidate target cells as second-level target cells, wherein the arrangement sequence inside the second-level target cells is determined according to the reconstruction sequence;

Determining the traversing order to be the first-level target cell in preference to the second-level target cell.

10. The method for selecting a rebuilt target cell according to claim 1, further comprising:

if the plurality of reconstruction candidate target cells are determined to be not successfully reconstructed, searching other frequency points except the plurality of reconstruction candidate target cells to acquire one or more external candidate target cells;

determining a reconstruction sequence of the external candidate target cell;

and reconstructing the external candidate target cell according to the reconstruction sequence of the external candidate target cell until the reconstruction is successful.

11. The method of claim 10, wherein determining the order of reconstruction of the external candidate target cells comprises:

determining PSS power of each external candidate target cell;

the PSS power values of the external candidate target cells are sequenced from big to small, so that the power sequence of the external candidate target cells is obtained;

and determining the reconstruction sequence of the external candidate target cell according to the power sequence.

12. The method for selecting a reconstruction target cell according to claim 11, wherein the external candidate target cell includes an external FDD frequency point cell and an external TDD frequency point cell;

determining the reconstruction sequence of the external candidate target cell according to the power sequence comprises:

determining a first external TDD frequency point cell and determining external FDD frequency point cells which are sequentially arranged behind the first external TDD frequency point cell;

traversing the external FDD frequency point cells which are sequentially arranged behind the first external TDD frequency point cell, and advancing the sequence of the external FDD frequency point cells to the front of the first external TDD frequency point cell if one or more of the following conditions are met:

the FDD frequency point signal quality parameter of the external FDD frequency point cell is larger than the preset multiple of the TDD frequency point signal quality parameter of the first external TDD frequency point cell;

the FDD frequency point signal quality parameter of the external FDD frequency point cell is greater than or equal to a second preset FDD frequency point quality threshold;

and the FDD frequency point signal intensity parameter of the external FDD frequency point cell is greater than or equal to a second preset FDD frequency point intensity threshold value.

13. The method of claim 10, wherein determining the order of reconstruction of the external candidate target cells comprises:

determining each external candidate target cell with the signal strength parameter being greater than or equal to a preset strength threshold value:

the following formula is used to determine the reconstructed composite value:

wherein I is _k Reconstruction synthesis value for representing kth external candidate target cell, sinr _k Signal quality parameter for representing kth external candidate target cell, RSSI _k For representing signal strength parameters of the kth external candidate target cell, factor1 for representing quality impact weight, factor2 for representing strength impact weight;

and sequencing the reconstruction comprehensive values of the plurality of external candidate target cells from large to small to obtain the reconstruction sequence.

14. The method of claim 13, further comprising, before ordering the reconstructed composite values of the plurality of external candidate target cells from large to small to obtain the reconstruction sequence:

determining an external candidate target cell with the minimum signal quality parameter from among the external candidate target cells with the signal strength parameter smaller than the preset strength threshold;

determining a reconstruction integrated value of each external candidate target cell with a signal strength parameter smaller than the preset strength threshold by adopting the following formula:

I _p ＝Sinr _min ×Factor1+RSSI _p ×Factor2

15. A selection apparatus for reconstructing a target cell, comprising:

a cell determining module, configured to determine a plurality of reconstruction candidate target cells;

a sequence determining module, configured to determine a quality impact weight for indicating an impact of a signal quality parameter on a reconstructed power, and determine a strength impact weight for indicating an impact of a signal strength parameter on a reconstructed power, and determine, for each reconstruction candidate target cell, a reconstruction sequence of the plurality of reconstruction candidate target cells according to a weighted sum value, where the weighted sum value is a signal quality parameter x quality impact weight + a signal strength parameter x strength impact weight;

a reconstruction module, configured to reconstruct at least a portion of the plurality of reconstruction candidate target cells according to a reconstruction sequence of the plurality of reconstruction candidate target cells until the reconstruction is successful;

Wherein the order determination module is further configured to perform:

the following formula is used to determine the reconstructed composite value:

16. A storage medium having stored thereon a computer program, which when executed by a processor performs the steps of the method of selecting a re-establishment target cell according to any of claims 1 to 14.

17. A terminal comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, characterized in that the processor, when executing the computer program, performs the steps of the method for selecting a re-establishment target cell according to any of claims 1 to 14.