CN110381546B

CN110381546B - Cell reselection method, terminal and network equipment

Info

Publication number: CN110381546B
Application number: CN201810330406.4A
Authority: CN
Inventors: 谢芳; 张晓然
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2018-04-13
Filing date: 2018-04-13
Publication date: 2021-07-16
Anticipated expiration: 2038-04-13
Also published as: CN110381546A

Abstract

The embodiment of the invention provides a cell reselection method, a terminal and network equipment, wherein the cell reselection method comprises the following steps: acquiring reselection parameters when a terminal reselects a target cell from a source cell, wherein the target cell is configured with at least one beam, the reselection parameters are related to the at least one beam, and the reselection parameters comprise: presetting a target reselection time period and/or parameters of a target cell; and reselecting the target cell according to the reselection parameters and the reselection conditions of the terminal reselecting the target cell. The invention provides a cell reselection mechanism based on multi-beam, when a terminal reselects a cell, the terminal configures reselection conditions and reselection time related to the multi-beam, so that the terminal reselects the cell with less beams as much as possible, the influence of multi-beam change on terminal connection is avoided, and the stable connection after the terminal cell is reselected is ensured.

Description

Cell reselection method, terminal and network equipment

Technical Field

The present invention relates to the field of communications, and in particular, to a cell reselection method, a terminal, and a network device.

Background

A fifth Generation (5Generation, 5G) mobile communication system, or New Radio (NR) system, may operate in a high frequency band of 6-100GHZ, and therefore, needs to rely on multiple beams to ensure coverage of common control channels, even data channels. The higher the operating frequency is, the more the number of beams that the cell may configure is, and the narrower the width of each beam is, the faster the beam may change. The working frequency of the 5G system is higher, the distribution range is wider, and the configurable beam number can be different for the 5G NR cells working on different frequencies. As shown in fig. 1, the terminal may measure 2 beams from cell 1 operating at 3.5GHz and 4 beams from cell 2 operating at 26 GHz. In a scenario of performing cell reselection (LTE-NR inter-RAT reselection) from a fourth Generation (4Generation, 4G) mobile communication system, or referred to as Long Time Evolution (LTE), to NR, and performing intra-NR cell reselection, if an existing reselection mechanism is adopted, the quality of a reselected cell may be poor, and the terminal connection may be unstable.

Disclosure of Invention

The invention provides a cell reselection method, a terminal and network equipment, which solve the problems of poor quality of reselected cells and unstable terminal connection caused by reselecting the terminal to an NR system cell by adopting the existing reselection mechanism.

To solve the above technical problem, an embodiment of the present invention provides the following solutions:

a method for reselecting a cell is applied to a terminal and comprises the following steps:

acquiring reselection parameters when a terminal reselects a target cell from a source cell, wherein the target cell is configured with at least one beam, the reselection parameters are related to the at least one beam, and the reselection parameters comprise: presetting a target reselection time period and/or parameters of a target cell;

and reselecting the target cell according to the reselection parameters and the reselection conditions of the terminal reselecting the target cell.

Wherein the reselection parameter is related to at least one of: the number of beams configured by the target cell; a number of beams of the at least one beam having a beam quality exceeding a preset threshold.

The reselection parameters further include a basic reselection time period and/or parameters of the source cell, wherein the preset target reselection time period is greater than the basic reselection time period.

Wherein, according to the reselection parameter and the reselection condition that the terminal reselects the target cell, the step of reselecting the target cell comprises one of the following steps:

reselecting the target cell according to a preset target reselection time period and reselection conditions for the terminal to reselect the target cell;

reselecting the target cell according to the first parameter of the source cell, the second parameter of the target cell and the reselection condition that the terminal reselects the target cell;

and reselecting the target cell according to a preset target reselection time period, the first parameter of the source cell, the second parameter of the target cell and the reselection condition that the terminal reselects the target cell.

Wherein the preset target reselection time period is Treselection_RAT+Treselection_beam；

Wherein Treselection_RATOn a basis of reselection time period, Treselection_beamA preset reselection time offset associated with at least one beam.

The step of reselecting the target cell according to the first parameter of the source cell, the second parameter of the target cell and the reselection condition that the terminal reselects the target cell comprises the following steps: and when the target cell is a pilot frequency or inter-system cell with high priority and the source cell provides a first preset threshold of the first parameter of the source cell, if the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein, if the second parameter of the target cell exceeds a second preset threshold, the step of reselecting the target cell comprises: if the Squal of the target cell>Thresh_X,HighQ+Thresh_beam,HighQOr Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

wherein, Squal is the signal quality value of the cell selection, and Srxlev is the signal level intensity value of the cell selection reception; thresh_X,HighQ+Thresh_beam,HighQFor a second preset threshold of Squal, Thresh_X,HighQBeing the base threshold of Squal, Thresh_beam,HighQIs the threshold offset of Squal;

Thresh_X,HighP+Thresh_beam,HighPa second predetermined threshold, Thresh, for Srxlev_X,HighPIs the base threshold, Thresh, for Srxlev_beam,HighPIs the threshold offset of Srxlev.

The reselection to the target cell according to the first parameter of the source cell, the second parameter of the target cell and the reselection condition that the terminal reselects to the target cell comprises the following steps:

and when the target cell is a pilot frequency or inter-system cell with high priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if a second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein, if the second parameter of the target cell exceeds a second preset threshold, the step of reselecting the target cell comprises: if Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell; among them, Thresh_X,HighP+Thresh_beam,HighPA second predetermined threshold, Thresh, for Srxlev_X,HighPIs the base threshold, Thresh, for Srxlev_beam,HighPIs the threshold offset of Srxlev.

The step of reselecting the target cell according to the first parameter of the source cell, the second parameter of the target cell and the reselection condition that the terminal reselects the target cell comprises the following steps: and when the target cell and the source cell are pilot frequency cells with the same frequency or the same priority, ranking the source cell and the target cell according to the first parameter and the second parameter to obtain a best ranked target cell, and reselecting the target cell.

The step of ranking the source cell and the target cell according to the first parameter and the second parameter includes: ranking the source cell and the target cell by the following formula;

rating of source cell

Rating of target cells

Wherein Q is_meas,sReference signal received power, RSRP, measurement for source cell, Q_HystFor the measurement hysteresis of the source cell,

is Q_HystThe amount of the offset of (a) is,

a measurement bias for a source cell;

Q_meas,nis the RSRP measurement, Q, of the target cell_offsetFor the first measurement offset of the target cell,

is Q_offsetThe amount of the offset of (a) is,

a second measurement offset for the target cell.

The step of reselecting the target cell according to the first parameter of the source cell, the second parameter of the target cell and the reselection condition that the terminal reselects the target cell comprises the following steps: and when the target cell is a low-priority pilot frequency or inter-system cell and the source cell provides a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

If the first parameter of the source cell is lower than a first preset threshold value and the second parameter of the target cell exceeds a second preset threshold value, the step of reselecting the target cell comprises the following steps:

if the Squal of the source cell<Thresh_Serving,LowQ-Thresh_{beam Serving,LowQ}And Squal of the target cell>Thresh_X,LowQ+Thresh_beam,LowQOr Srxlev of target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

among them, Thresh_Serving,LowQBase low threshold, Thresh, for Squal of the source cell_{beam Serving,LowQ}Is the offset of the Squal of the source cell;

Thresh_X,LowQis the base threshold, Thresh, of Squal for the target cell_beam,LowQIs the offset of Squal of the target cell;

Thresh_X,LowPis the base threshold, Thresh, of Srxlev of the target cell_beam,LowPIs the offset of Srxlev of the target cell.

The step of reselecting the target cell according to the first parameter of the source cell, the second parameter of the target cell and the reselection condition that the terminal reselects the target cell comprises the following steps: and when the target cell is a pilot frequency or inter-system cell with low priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

if Srxlev of source cell<Thresh_Serving,LowP-Thresh_{beam Serving,LowP}And Srxlev of the target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

among them, Thresh_Serving,LowPBase threshold, Thresh, for Srxlev of the source cell_{beam Serving,LowP}An offset of Srxlev for the source cell;

The step of obtaining reselection parameters when the terminal reselects from a source cell to a target cell comprises the following steps: receiving reselection parameters when a terminal reselects a target cell from a source cell through a preset message; wherein the preset message comprises: at least one of a broadcasted system message, a radio resource control, RRC, connection release message, an RRC reconfiguration message, and an RRC dedicated signaling configuration message.

Wherein the step of reselecting to the target cell comprises one of: when the reselected target cell comprises a plurality of cells with different priorities, selecting the cell with the highest priority for access;

when the target cell is reselected to comprise a plurality of cells with the same priority, sorting the plurality of cells with the same priority according to a preset sorting condition, and then selecting the cell with the best sorting for access;

and when the reselected target cell comprises a plurality of cells, selecting the cell with the least beam for access.

An embodiment of the present invention further provides a terminal, including: a transceiver configured to acquire a reselection parameter when a terminal reselects from a source cell to a target cell, where the target cell is configured with at least one beam, and the reselection parameter is related to the at least one beam, and the reselection parameter includes: presetting a target reselection time period and/or parameters of a target cell;

and the processor is used for reselecting the target cell according to the reselection parameters and the reselection conditions of the terminal reselecting the target cell.

Wherein the processor is configured to perform one of: reselecting the target cell according to a preset target reselection time period and reselection conditions for the terminal to reselect the target cell;

Wherein the processor is configured to perform: and when the target cell is a pilot frequency or inter-system cell with high priority and the source cell provides a first preset threshold of the first parameter of the source cell, if the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the processor is configured to perform: if the Squal of the target cell>Thresh_X,HighQ+Thresh_beam,HighQOr Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

wherein, Squal is the signal quality value of the cell selection, and Srxlev is the signal level intensity value of the cell selection reception;

Thresh_X,HighQ+Thresh_beam,HighQfor a second preset threshold of Squal, Thresh_X,HighQBeing the base threshold of Squal, Thresh_beam,HighQIs the threshold offset of Squal;

Wherein the processor is configured to perform:

Wherein the processor is configured to perform: if Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

among them, Thresh_X,HighP+Thresh_beam,HighPA second predetermined threshold, Thresh, for Srxlev_X,HighPIs the base threshold, Thresh, for Srxlev_beam,HighPIs the threshold offset of Srxlev.

Wherein the processor is configured to perform:

and when the target cell and the source cell are pilot frequency cells with the same frequency or the same priority, ranking the source cell and the target cell according to the first parameter and the second parameter to obtain a best ranked target cell, and reselecting the target cell.

Wherein the processor is configured to perform: ranking the source cell and the target cell by the following formula;

rating of source cell

Rating of target cells

is Q_HystThe amount of the offset of (a) is,

a measurement bias for a source cell;

is Q_offsetThe amount of the offset of (a) is,

a second measurement offset for the target cell.

Wherein the processor is configured to perform: and when the target cell is a low-priority pilot frequency or inter-system cell and the source cell provides a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the processor is configured to perform:

and when the target cell is a pilot frequency or inter-system cell with low priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the processor is configured to perform:

receiving reselection parameters when a terminal reselects a target cell from a source cell through a preset message; wherein the preset message comprises: at least one of a broadcasted system message, a radio resource control, RRC, connection release message, an RRC reconfiguration message, and an RRC dedicated signaling configuration message.

Wherein the processor is configured to perform one of: when the reselected target cell comprises a plurality of cells with different priorities, selecting the cell with the highest priority for access;

A method for cell reselection is applied to network equipment and comprises the following steps:

sending reselection parameters when the terminal reselects from a source cell to a target cell, wherein the target cell is configured with at least one beam, the reselection parameters are related to the at least one beam, and the reselection parameters comprise: and presetting a target reselection time period and/or parameters of the target cell.

Wherein the step of sending reselection parameters to the terminal when reselecting from the source cell to the target cell comprises:

sending reselection parameters when a source cell is reselected to a target cell to a terminal through a preset message, wherein the preset message comprises: at least one of a broadcasted system message, a radio resource control, RRC, connection release message, an RRC reconfiguration message, and an RRC dedicated signaling configuration message.

A network device, comprising: a processor; a memory coupled to the processor, and a transceiver coupled to the processor; wherein the processor is configured to invoke and execute the programs and data stored in the memory, and the transceiver is configured to transmit reselection parameters when reselecting from a source cell to a target cell to the terminal, the target cell being configured with at least one beam, the reselection parameters being related to the at least one beam, the reselection parameters including: and presetting a target reselection time period and/or parameters of the target cell.

Wherein the transceiver is configured to perform:

A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the cell reselection method described above.

The scheme of the invention at least comprises the following beneficial effects:

in the above scheme of the present invention, a reselection parameter when a terminal reselects a target cell from a source cell is obtained, the target cell is configured with at least one beam, the reselection parameter is related to the at least one beam, and the reselection parameter includes: presetting a target reselection time period and/or parameters of a target cell; and reselecting the target cell according to the reselection parameters and the reselection conditions of the terminal reselecting the target cell. Therefore, when the terminal reselects the cell, the terminal does not simply judge whether the parameter of the target cell is larger than the relevant threshold to reselect, but reselects when a certain condition is met at least according to the preset target reselection time larger than the normal reselection time period or the reselection parameter of the target cell, and the reselection parameter takes the influence of the number of beams into consideration, so that the terminal reselects the cell with fewer beams as much as possible, the influence of multi-beam change on the terminal connection is avoided, and the stable connection after the terminal cell is reselected is ensured.

Drawings

Fig. 1 is a schematic diagram of beam coverage and multi-beam detection for a 5G NR cell;

fig. 2 is a flowchart illustrating a method for cell reselection on a terminal side according to an embodiment of the present invention;

fig. 3 is a block diagram of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 2, an embodiment of the present invention provides a method for cell reselection, which is applied to a terminal side, and the method includes the following steps:

and step 21, acquiring reselection parameters when the terminal reselects from the source cell to the target cell.

Specifically, the reselection parameters when the terminal reselects from the source cell to the target cell can be received through a preset message; wherein the preset message comprises: at least one of a broadcasted system message, a Radio Resource Control (RRC) connection release message, an RRC reconfiguration message, and an RRC dedicated signaling configuration message.

Here, the target cell is configured with at least one beam, and the reselection parameter is related to the at least one beam, and includes: and presetting a target reselection time period and/or parameters of the target cell.

And step 22, reselecting the target cell according to the reselection parameters and the reselection conditions of the terminal reselecting the target cell.

In this embodiment, the reselection parameter is related to the number of beams configured by the target cell, or the number of beams with the beam quality exceeding a preset threshold in at least one beam, or both the number of beams configured by the target cell and the number of beams with the beam quality exceeding a preset threshold in at least one beam. Specifically, when the terminal is in a poor coverage condition and the terminal resides in the current serving cell above TIMER1, measurements of the same frequency, different frequency and different systems are gradually opened. For the NR cell configured with multi-beam, the reselection quality threshold and/or time is superimposed with corresponding offset on the original basis. The more beams configured by the target cell, the higher the quality threshold corresponding to the target cell is reselected, and the longer the time is.

Further, the reselection parameters may further include: and the time period of the basic reselection and/or the parameters of the source cell, wherein the preset target reselection time period is greater than the time period of the basic reselection.

In this embodiment of the present invention, by obtaining a reselection parameter when the terminal reselects from the source cell to the target cell, the target cell is configured with at least one beam, the reselection parameter is related to the at least one beam, and the target cell is reselected according to the reselection parameter and a reselection condition that the terminal reselects to the target cell. Therefore, when the terminal reselects the cell, the terminal does not simply judge whether the parameter of the target cell is larger than the relevant threshold to reselect, but reselects when a certain condition is met at least according to the preset target reselection time larger than the normal reselection time period or the reselection parameter of the target cell, and the reselection parameter takes the influence of the number of beams into consideration, so that the terminal reselects the cell with fewer beams as much as possible, the influence of multi-beam change on the terminal connection is avoided, and the stable connection after the terminal cell is reselected is ensured.

In an embodiment of the present invention, a method for cell reselection includes the following steps:

Wherein the target cell is configured with at least one beam, and the reselection parameter is related to the at least one beam, and comprises: and presetting a target reselection time period and/or parameters of the target cell. The reselection parameter and the number of beams configured in the target cellThe quantity is related to the number of beams with the beam quality exceeding a preset threshold value in at least one beam, or the number of beams configured by the target cell and the number of beams with the beam quality exceeding the preset threshold value in at least one beam are related; further, the reselection parameters may further include: a basic reselection time period and/or parameters of a source cell, wherein the preset target reselection time period is greater than the basic reselection time period; the preset target reselection time period may be Treselection_RAT+Treselection_beam(ii) a Wherein Treselection_RATOn a basis of reselection time period, Treselection_beamA preset reselection time offset associated with at least one beam. Wherein Treselection_beamIs an offset amount to the reselection time after introduction of multi-beam (multi-beam), the larger the number of beams, the larger the value.

And step 221, reselecting the target cell according to a preset target reselection time period and a reselection condition that the terminal reselects the target cell.

In this embodiment, for an NR cell configured with multiple beams, the reselection time overlaps a corresponding offset on the original basis. The more beams configured by the target cell, the longer the corresponding time for reselecting the target cell. Therefore, by acquiring a preset target reselection time period when the terminal reselects the target cell from a source cell, the target cell is configured with at least one beam, and the preset target reselection time period is related to the at least one beam, so that when the terminal reselects the cell, the terminal does not simply judge whether the parameter of the target cell is larger than a related threshold to perform reselection, but reselects the cell when the preset target reselection time larger than the normal reselection time period meets a certain condition, and the reselection parameter takes the influence of the number of the beams into consideration, so that the terminal reselects the cell with fewer beams as much as possible, the influence of multi-beam change on terminal connection is avoided, and stable connection after the terminal cell is reselected is ensured.

The target cell is configured with at least one beam, and the reselection parameter is related to the at least one beam and includes a reselection quality threshold. The reselection parameter is related to the number of beams configured by the target cell, or the number of beams with the beam quality exceeding a preset threshold in at least one beam, or both the number of beams configured by the target cell and the number of beams with the beam quality exceeding the preset threshold in at least one beam.

Step 222, reselecting the target cell according to the first parameter of the source cell, the second parameter of the target cell and the reselection condition that the terminal reselects the target cell.

In this embodiment, for an NR cell configured with multiple beams, the reselection quality threshold is superimposed with a corresponding offset on the original basis. The more beams configured by the target cell, the higher the quality threshold corresponding to the target cell is reselected. Therefore, by acquiring the reselection quality threshold when the terminal reselects the target cell from the source cell, the target cell is configured with at least one beam, and the reselection quality threshold is related to the at least one beam, so that when the terminal reselects the cell, the influence of the number of the beams is considered, the terminal reselects the cell with fewer beams as much as possible, the influence of multi-beam change on terminal connection is avoided, and stable connection after terminal cell reselection is ensured.

Specifically, the first implementation manner of this step 222 includes:

and when the target cell is a pilot frequency or inter-system cell with high priority and the source cell provides a first preset threshold of the first parameter of the source cell, if the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

If the second parameter of the target cell exceeds a second preset threshold, the step of reselecting the target cell comprises the following steps:

if the Squal of the target cell>Thresh_X,HighQ+Thresh_beam,HighQOr Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

Taking RSRQ as an example, for an inter-frequency or inter-system cell in which the target cell is a high priority, if the system provides a threshold threshServingLowQ based on RSRQ, the target cell may be reselected to the past as long as its Squal exceeds the corresponding threshold for a period of time. Wherein the reselection condition is set to Squal>Thresh_X,HighQ+ (or x or-) Thresh_beam,HighQ(ii) a Alternatively, Srxlev>Thresh_X,HighP+ (or x or-) Thresh_beam,HighP. The present embodiment is merely exemplary in a weighted manner, wherein Thresh_beam,HighQAnd Thresh_beam,HighPRespectively, the RSRQ of the target cell reselection after introduction of a multi-beam (multi-beam) and the offset of the RSRP threshold, which may be a set of positive or dB values corresponding to the number of beams, the larger the value.

A second implementation of this step 222 includes:

Wherein, if the second parameter of the target cell exceeds a second preset threshold, the step of reselecting the target cell comprises:

if Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

among them, Thresh_X,HighP+Thresh_beam,HighPIs SrxlSecond preset threshold of ev, Thresh_X,HighPIs the base threshold, Thresh, for Srxlev_beam,HighPIs the threshold offset of Srxlev.

Taking RSRP as an example, for a pilot frequency or inter-system cell with a high priority as a target cell, if the system does not provide a RSRQ-based threshold, the target cell may be reselected to the past as long as Srxlev of the target cell exceeds the corresponding threshold for a period of time. Wherein the reselection condition is set to Srxlev>Thresh_X,HighP+ (or x or-) Thresh_beam,HighP. The present embodiment is merely exemplary in a weighted manner, wherein Thresh_beam,HighPRespectively, the RSRQ of the target cell reselection after introduction of a multi-beam (multi-beam) and the offset of the RSRP threshold, which may be a set of positive or dB values corresponding to the number of beams, the larger the value.

A third implementation of this step 222 includes:

The step of ranking the source cell and the target cell according to the first parameter and the second parameter includes:

ranking the source cell and the target cell by the following formula;

rating of source cell

Rating of target cells

is Q_HystIs offset fromThe amount of the compound (A) is,

a measurement bias for a source cell;

is Q_offsetThe amount of the offset of (a) is,

a second measurement offset for the target cell.

For Q after introduction of multiple beams (multi-beam)_HystAnd Q_offsetThe amount of offset of (c).

And for the pilot frequency cells with the same frequency or priority of the target cell, the terminal ranks the current serving cell and the adjacent cells according to a cell ranking criterion, and the terminal reselects the best ranked cell.

A fourth implementation of this step 222 includes:

and when the target cell is a low-priority pilot frequency or inter-system cell and the source cell provides a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

if the Squal of the source cell<Thresh_Serving,LowQ-Thresh_{beam Serving,LowQ}And Squal of the target cell>Thresh_X,LowQ+Thresh_beam,LowQOr Srxlev of target cell>Thresh_X,LowP+Thresh_beam,LowPThen reselect to the target cell；

Taking RSRQ as an example, for an inter-frequency or inter-system cell with a low priority target cell, if the system provides a threshold threshServingLowQ based on RSRQ, the reselection may be performed when the serving cell Squal or Srxlev is below the corresponding threshold and the Squal or Srxlev of the low priority cell exceeds the corresponding threshold again within a period of time. Among them, Thresh_{beam Serving,LowQ}And Thresh_beam,LowQRespectively, an offset to a target cell reselection RSRQ threshold value after introduction of a multi-beam (multi-beam), Thresh_{beam Serving,LowQ}And Thresh_beam,LowPThe offset of the target cell reselection RSRP threshold after introducing the multiple beams is respectively, and the numerical value may be a set of positive numbers or dB values corresponding to the beam number, and the larger the beam number is, the larger the value is.

A fifth implementation of this step 222 includes:

Taking RSRP as an example, for an inter-frequency or inter-system cell with a low priority target cell, if the system does not provide a threshold threshServingLowQ based on RSRQ, when Srxlev of the serving cell is lower than the corresponding threshold and Srxlev of the low priority cell exceeds the corresponding threshold again within a period of time, the cell can be reselected. Among them, Thresh_{beam Serving,LowP}And Thresh_beam,LowPRespectively, the offset to the target cell reselection RSRP threshold after introduction of a multi-beam (multi-beam) may be a set of positive or dB values corresponding to the number of beams, the greater the value.

Wherein the target cell is configured with at least one beam, and the reselection parameter is related to the at least one beam, and comprises: and presetting a target reselection time period and/or parameters of the target cell. The reselection parameter is related to the number of beams configured by the target cell, or the number of beams with the beam quality exceeding a preset threshold in at least one beam, or both the number of beams configured by the target cell and the number of beams with the beam quality exceeding the preset threshold in at least one beam; further, the reselection parameters may further include: a basic reselection time period and/or parameters of a source cell, wherein the preset target reselection time period is greater than the basic reselection time period; the preset target reselection time period may be Treselection_RAT+Treselection_beam(ii) a Wherein Treselection_RATOn a basis of reselection time period, Treselection_beamIs connected with at least oneA beam dependent preset reselection time offset. Wherein Treselection_beamIs an offset amount to the reselection time after introduction of multi-beam (multi-beam), the larger the number of beams, the larger the value.

Step 223, reselecting the target cell according to a preset target reselection time period, the first parameter of the source cell, the second parameter of the target cell, and the reselection condition that the terminal reselects the target cell.

In this embodiment, for an NR cell configured with multiple beams, the reselection quality threshold is superimposed with a corresponding offset on the original basis, and the reselection time is superimposed with a corresponding offset on the original basis. The more the beams configured by the target cell are, the higher the quality threshold corresponding to the target cell is reselected, and the longer the time corresponding to the target cell is reselected. Therefore, by acquiring the preset target reselection time period when the terminal reselects the target cell from the source cell, the target cell is configured with at least one beam, and the reselection parameter takes the influence of the number of the beams into consideration, so that the terminal reselects the cell with fewer beams as much as possible, the influence of multi-beam change on the terminal connection is avoided, and the stable connection after the terminal cell is reselected is ensured.

Specifically, the first implementation manner of this step 222 includes:

and if the second parameter of the target cell exceeds a second preset threshold within a preset target reselection time period, reselecting the target cell when the target cell is a pilot frequency or a different system cell with high priority and the source cell provides a first preset threshold of the first parameter of the source cell.

If the second parameter of the target cell exceeds a second preset threshold value within the preset target reselection time period, the step of reselecting the target cell comprises the following steps:

if Treselection is performed within a preset target reselection time period_RAT+Treselection_beamSqual of inner and target cell>Thresh_X,HighQ+Thresh_beam,HighQOr Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

Taking RSRQ as an example, for an inter-frequency or inter-system cell in which the target cell is a high priority, if the system provides a threshold threshServingLowQ based on RSRQ, the target cell may be reselected to the past as long as its Squal exceeds the corresponding threshold for a period of time. Wherein the reselection condition is set to Squal>Thresh_X,HighQ+ (or x or-) Thresh_beam,HighQ during a time interval Treselection_RAT+ (or-) Treselection_beam(ii) a Alternatively, Srxlev>Thresh_X,HighP+ (or x or-) Thresh_beam,HighP during a time interval Treselection_RAT+ (or-) Treselection_beam. The present embodiment is merely exemplary in a weighted manner, wherein Thresh_beam,HighQAnd Thresh_beam,HighPRespectively, the RSRQ of the target cell reselection after introduction of a multi-beam (multi-beam) and the offset of the RSRP threshold, which may be a set of positive or dB values corresponding to the number of beams, the larger the value.

A second implementation of this step 222 includes:

and if the second parameter of the target cell exceeds a second preset threshold within a preset target reselection time period, reselecting the target cell when the target cell is a pilot frequency or inter-system cell with high priority and the source cell does not provide a first preset threshold of the first parameter of the source cell.

if at the preset destinationStandard reselection time period Treselection_RAT+Treselection_beamSrxlev of inner and target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

Taking RSRP as an example, for a pilot frequency or inter-system cell with a high priority as a target cell, if the system does not provide a RSRQ-based threshold, the target cell may be reselected to the past as long as Srxlev of the target cell exceeds the corresponding threshold for a period of time. Wherein the reselection condition is set to Srxlev>Thresh_X,HighP+ (or x or-) Thresh_beam,HighP during a time interval Treselection_RAT+ (or-) Treselection_beam. The present embodiment is merely exemplary in a weighted manner, wherein Thresh_beam,HighPRespectively, the RSRQ of the target cell reselection after introduction of a multi-beam (multi-beam) and the offset of the RSRP threshold, which may be a set of positive or dB values corresponding to the number of beams, the larger the value.

A third implementation of this step 222 includes:

ranking the source cell and the target cell by the following formula;

rating of source cell

Rating of target cells

is Q_HystThe amount of the offset of (a) is,

a measurement bias for a source cell;

is Q_offsetThe amount of the offset of (a) is,

a second measurement offset for the target cell.

For the different-frequency cells with the same frequency or priority of the target cell, the terminal ranks the current serving cell and the neighboring cells according to a cell ranking criterion, and reselects the best ranked cell, preferably, the reselection time also performs corresponding shift Treselection_RAT+Treselection_beam。

A fourth implementation of this step 222 includes:

when the target cell is a low-priority pilot frequency or inter-system cell and the source cell provides a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold within a preset target reselection time period, reselecting the target cell.

if Treselection is performed within a preset target reselection time period_RAT+Treselection_beamSqual of inner and source cell<Thresh_Serving,LowQ-Thresh_beam _Serving,LowQAnd Squal of the target cell>Thresh_X,LowQ+Thresh_beam,LowQOr Srxlev of target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

A fifth implementation of this step 222 includes:

and when the target cell is a pilot frequency or inter-system cell with low priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold within a preset target reselection time period, reselecting the target cell.

if Treselection is performed within a preset target reselection time period_RAT+Treselection_beamSrxlev of inner and source cell<Thresh_Serving,LowP-Thresh_{beam Serving,LowP}And Srxlev of the target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

In the above embodiments of the present invention, when reselecting to the target cell, the following steps may be performed:

1) when the reselected target cell comprises a plurality of cells with different priorities, selecting the cell with the highest priority for access;

2) when the target cell is reselected to comprise a plurality of cells with the same priority, sorting the plurality of cells with the same priority according to a preset sorting condition, and then selecting the cell with the best sorting for access;

3) and when the reselected target cell comprises a plurality of cells, selecting the cell with the least beam for access.

That is, if a plurality of cells of different priorities satisfy the reselection condition, a target cell of high priority must be reselected; if a plurality of cells in the same priority satisfy the condition, reselecting the best ranked target cell; particularly, for cells with rating difference within a certain range Delta, including a serving cell and an adjacent cell, the quality of the cells is considered to be equivalent, and the terminal preferentially reselects a target cell with less cell configuration beams.

In the above embodiment of the present invention, by obtaining the reselection parameter when the terminal reselects the target cell from the source cell, the target cell is configured with at least one beam, the reselection parameter is related to the at least one beam, and the target cell is reselected according to the reselection parameter and the reselection condition that the terminal reselects the target cell. Therefore, when the terminal reselects the cell, the terminal does not simply judge whether the parameter of the target cell is larger than the relevant threshold to reselect, but reselects when a certain condition is met at least according to the preset target reselection time larger than the normal reselection time period or the reselection parameter of the target cell, and the reselection parameter takes the influence of the number of beams into consideration, so that the terminal reselects the cell with fewer beams as much as possible, the influence of multi-beam change on the terminal connection is avoided, and the stable connection after the terminal cell is reselected is ensured.

As shown in fig. 3, corresponding to the method at the terminal side, an embodiment of the present invention further provides a terminal 30, including: a transceiver 31, configured to obtain reselection parameters when the terminal reselects from a source cell to a target cell, where the target cell is configured with at least one beam, and the reselection parameters are related to the at least one beam, where the reselection parameters include: presetting a target reselection time period and/or parameters of a target cell;

and the processor 32 is configured to reselect the target cell according to the reselection parameter and the reselection condition that the terminal reselects the target cell.

Wherein the processor 32 is configured to perform one of:

Wherein the processor 32 is configured to perform: and when the target cell is a pilot frequency or inter-system cell with high priority and the source cell provides a first preset threshold of the first parameter of the source cell, if the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the processor 32 is configured to perform: if the Squal of the target cell>Thresh_X,HighQ+Thresh_beam,HighQOr Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

Wherein the processor 32 is configured to perform: and when the target cell is a pilot frequency or inter-system cell with high priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if a second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the processor 32 is configured to perform:

Wherein the processor 32 is configured to perform: and when the target cell and the source cell are pilot frequency cells with the same frequency or the same priority, ranking the source cell and the target cell according to the first parameter and the second parameter to obtain a best ranked target cell, and reselecting the target cell.

Wherein the processor 32 is configured to perform: ranking the source cell and the target cell by the following formula;

rating of source cell

Rating of target cells

Wherein Q is_meas,sReference signal received power R for source cellSRP measurement, Q_HystFor the measurement hysteresis of the source cell,

is Q_HystThe amount of the offset of (a) is,

a measurement bias for a source cell;

is Q_offsetThe amount of the offset of (a) is,

a second measurement offset for the target cell.

Wherein the processor 32 is configured to perform: and when the target cell is a low-priority pilot frequency or inter-system cell and the source cell provides a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the processor 32 is configured to perform: if the Squal of the source cell<Thresh_Serving,LowQ-Thresh_{beam Serving,LowQ}And Squal of the target cell>Thresh_X,LowQ+Thresh_beam,LowQOr Srxlev of target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

Wherein the processor 32 is configured to perform: and when the target cell is a pilot frequency or inter-system cell with low priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the processor 32 is configured to perform: if Srxlev of source cell<Thresh_Serving,LowP-Thresh_{beam Serving,LowP}And Srxlev of the target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

Wherein the processor 32 is configured to perform: receiving reselection parameters when a terminal reselects a target cell from a source cell through a preset message; wherein the preset message comprises: at least one of a broadcasted system message, a radio resource control, RRC, connection release message, an RRC reconfiguration message, and an RRC dedicated signaling configuration message.

Wherein the processor 32 is configured to perform one of: when the reselected target cell comprises a plurality of cells with different priorities, selecting the cell with the highest priority for access;

It should be noted that all the implementation manners of the method described in the terminal side are applicable to the embodiment of the terminal, and the same technical effect can be achieved. And further, the embodiment of the terminal may further include a memory connected to the processor 32; the processor 32 is configured to call and execute the program and data stored in the memory, the transceiver 31 is communicatively connected to the processor 32 through a bus interface or an interface, the transceiver 31 is communicatively connected to the memory through the bus interface or the interface, and the processor 32 is communicatively connected to the memory through the bus interface or the interface. The functions of the transceiver 31 described above may also be implemented by the processor 32. The terminal of the invention may also comprise other components, such as a user interface, etc., for implementing the above-described method.

Corresponding to the method at the terminal side, an embodiment of the present invention further provides a terminal, including:

an obtaining module, configured to obtain a reselection parameter when a terminal reselects a target cell from a source cell, where the target cell is configured with at least one beam, the reselection parameter is related to the at least one beam, and the reselection parameter includes: presetting a target reselection time period and/or parameters of a target cell;

and the reselection module is used for reselecting the target cell according to the reselection parameters and the reselection conditions of the terminal reselecting the target cell.

Wherein the reselection module is to perform one of:

Wherein the reselection module is configured to: and when the target cell is a pilot frequency or inter-system cell with high priority and the source cell provides a first preset threshold of the first parameter of the source cell, if the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the reselection module is configured to: if the Squal of the target cell>Thresh_X,HighQ+Thresh_beam,HighQOr Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

Wherein the reselection module is configured to: and when the target cell is a pilot frequency or inter-system cell with high priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if a second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the reselection module is configured to: if Srxlev of target cell>Thresh_X,HighP+Thresh_beam,HighPReselecting the target cell;

Wherein the reselection module is configured to: and when the target cell and the source cell are pilot frequency cells with the same frequency or the same priority, ranking the source cell and the target cell according to the first parameter and the second parameter to obtain a best ranked target cell, and reselecting the target cell.

Wherein the reselection module is configured to: ranking the source cell and the target cell by the following formula;

rating of source cell

Rating of target cells

is Q_HystThe amount of the offset of (a) is,

a measurement bias for a source cell;

is Q_offsetThe amount of the offset of (a) is,

a second measurement offset for the target cell.

Wherein the reselection module is configured to: and when the target cell is a low-priority pilot frequency or inter-system cell and the source cell provides a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the reselection module is configured to: if the Squal of the source cell<Thresh_Serving,LowQ-Thresh_{beam Serving,LowQ}And Squal of the target cell>Thresh_X,LowQ+Thresh_beam,LowQOr Srxlev of target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

Wherein the reselection module is configured to: and when the target cell is a pilot frequency or inter-system cell with low priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell.

Wherein the reselection module is configured to: if Srxlev of source cell<Thresh_Serving,LowP-Thresh_{beam Serving,LowP}And Srxlev of the target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

Thresh_X,LowPis a target ofBase threshold, Thresh, for Srxlev of a cell_beam,LowPIs the offset of Srxlev of the target cell.

Wherein the reselection module is configured to: receiving reselection parameters when a terminal reselects a target cell from a source cell through a preset message; wherein the preset message comprises: at least one of a broadcasted system message, a radio resource control, RRC, connection release message, an RRC reconfiguration message, and an RRC dedicated signaling configuration message.

Wherein the reselection module is to perform one of: when the reselected target cell comprises a plurality of cells with different priorities, selecting the cell with the highest priority for access;

It should be noted that all the implementation manners of the method described in the terminal side are applicable to the embodiment of the terminal, and the same technical effect can be achieved.

The above describes the method for cell reselection on the terminal side of the present invention, and the following embodiment further describes the method for cell reselection on the network device side.

The embodiment of the invention provides a cell reselection method, which is applied to network equipment and comprises the following steps:

Wherein the reselection parameter is related to at least one of: the number of beams configured by the target cell;

a number of beams of the at least one beam having a beam quality exceeding a preset threshold.

Further, the reselection parameters further include a basic reselection time period and/or parameters of the source cell, where the preset target reselection time period is greater than the basic reselection time period.

In this embodiment, the step of sending the reselection parameter when the terminal reselects from the source cell to the target cell may specifically include: sending reselection parameters when a source cell is reselected to a target cell to a terminal through a preset message, wherein the preset message comprises: at least one of a broadcasted system message, a radio resource control, RRC, connection release message, an RRC reconfiguration message, and an RRC dedicated signaling configuration message.

It should be noted that: the embodiment is a network side method corresponding to the terminal side method, and all the specific implementation of the steps related to the interaction with the network side in the terminal side method are all applicable to the network side network device method, and the same technical effects can be achieved.

Corresponding to the method on the network side, an embodiment of the present invention further provides a network device, including: a processor; a memory coupled to the processor, and a transceiver coupled to the processor; wherein the processor is configured to invoke and execute the programs and data stored in the memory, and the transceiver is configured to transmit reselection parameters when reselecting from a source cell to a target cell to the terminal, the target cell being configured with at least one beam, the reselection parameters being related to the at least one beam, the reselection parameters including: and presetting a target reselection time period and/or parameters of the target cell.

Wherein the transceiver is configured to perform: sending reselection parameters when a source cell is reselected to a target cell to a terminal through a preset message, wherein the preset message comprises: at least one of a broadcasted system message, a radio resource control, RRC, connection release message, an RRC reconfiguration message, and an RRC dedicated signaling configuration message. It should be noted that the embodiment of the network device is a device corresponding to the method, and all implementation manners in the embodiment of the method are applicable to the embodiment of the network device, and the same technical effect can be achieved.

Corresponding to the method on the network device side, an embodiment of the present invention further provides a network device, including:

a sending module, configured to send, to a terminal, a reselection parameter when reselecting from a source cell to a target cell, where the target cell is configured with at least one beam, and the reselection parameter is related to the at least one beam, and the reselection parameter includes: and presetting a target reselection time period and/or parameters of the target cell.

Wherein the reselection parameter is related to at least one of:

the number of beams configured by the target cell;

Wherein, the sending module is used for executing:

An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above. The processor and the memory are connected through a bus or an interface. The communication device may be a network device, such as a base station, or a terminal.

Embodiments of the present invention also provide a computer-readable storage medium including instructions which, when executed on a computer, cause the computer to perform the above method.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for cell reselection is applied to a terminal, and is characterized in that the method comprises the following steps:

acquiring reselection parameters when a terminal reselects from a source cell to a target cell, wherein the target cell is configured with at least one beam, the reselection parameters are related to the at least one beam, and the reselection parameters comprise: basic reselection time period Treselection_RATAnd/or a first parameter of the source cell, a preset target reselection time period and/or a second parameter of the target cell, wherein the preset target reselection time period is a basic reselection time period Treselection_RAT+Treselection_beam，Treselection_beamA preset reselection time offset associated with the at least one beam; the second parameter of the target cell includes: selecting a signal quality value Squal by a cell, selecting a received signal level strength value Srxlev by the cell, and relating to a beam of a target cell;

2. The method of cell reselection according to claim 1, wherein said reselection parameter is related to at least one of:

the number of beams configured by the target cell;

3. The method of cell reselection according to claim 1, wherein the preset target reselection time period is greater than a base reselection time period.

4. The method of cell reselection according to claim 3, wherein, according to the reselection parameter and the reselection condition for the terminal to reselect to the target cell, the step of reselecting to the target cell comprises one of the following steps:

and reselecting the target cell according to the preset target reselection time period, the first parameter of the source cell, the second parameter of the target cell and the reselection condition that the terminal reselects the target cell.

5. The method of cell reselection according to claim 4, wherein the step of reselecting to the target cell according to the first parameter of the source cell, the second parameter of the target cell, and the reselection condition for the terminal to reselect to the target cell comprises:

when the target cell is a high-priority inter-frequency or inter-system cell and the source cell provides a first preset threshold of the first parameter of the source cell, if a second parameter of the target cell exceeds a second preset threshold, reselecting the target cell, including:

the signal quality value is a cell selection signal quality value, and the Srxlev is a cell selection receiving signal level strength value;

Thresh_X,HighP+Thresh_beam,HighPa second predetermined threshold, Thresh, for Srxlev_X,HighPIs the base threshold, Thresh, for Srxlev_beam,HighPA threshold offset of Srxlev; thresh_beam,HighQAnd Thresh_beam,HighPThe values of the offsets of the target cell reselection RSRQ and the RSRP threshold after the multi-beam is introduced are a set of positive numbers or dB values corresponding to the beam numbers, and the larger the beam numbers are, the larger the value is.

6. The method of cell reselection according to claim 4, wherein the reselecting to the target cell according to the first parameter of the source cell, the second parameter of the target cell, and a reselection condition for the terminal to reselect to the target cell comprises:

when the target cell is a high-priority inter-frequency or inter-system cell and the source cell does not provide a first preset threshold of the first parameter of the source cell, if a second parameter of the target cell exceeds a second preset threshold, reselecting the target cell, including:

among them, Thresh_X,HighP+Thresh_beam,HighPA second predetermined threshold, Thresh, for Srxlev_X,HighPIs the base threshold, Thresh, for Srxlev_beam,HighPA threshold offset of Srxlev; thresh_beam,HighQAnd Thresh_beam,HighPThe values of the offsets of the target cell reselection RSRQ and the RSRP threshold after the multi-beam is introduced are a set of positive numbers or dB values corresponding to the beam numbers, and the larger the beam numbers are, the larger the value is.

7. The method of cell reselection according to claim 4, wherein the step of reselecting to the target cell according to the first parameter of the source cell, the second parameter of the target cell, and the reselection condition for the terminal to reselect to the target cell comprises:

when the target cell and the source cell are pilot frequency cells with the same frequency or the same priority, ranking the source cell and the target cell according to the first parameter and the second parameter to obtain a best ranked target cell, and reselecting the target cell, including:

ranking the source cell and the target cell by the following formula;

rating of source cell

Rating of target cells

Wherein Q is_meas,sReference signal received power, RSRP, measurement for source cell, Q_HystFor measurement hysteresis of the source cell, of the source cell

Is Q_HystOf the source cell

A measurement bias for a source cell;

Q_meas,nis the RSRP measurement, Q, of the target cell_offsetBiasing for a first measurement of a target cell, of the target cell

Is Q_offsetOf the target cell

A second measurement offset for the target cell;

8. The method of cell reselection according to claim 4, wherein the step of reselecting to the target cell according to the first parameter of the source cell, the second parameter of the target cell, and the reselection condition for the terminal to reselect to the target cell comprises:

when the target cell is a low-priority inter-frequency or inter-system cell and the source cell provides a first preset threshold of a first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and a second parameter of the target cell exceeds a second preset threshold, reselecting the target cell, including:

if the Squal of the source cell<Thresh_Serving,LowQ-Thresh_{beam Serving,LowQ}And Squal of the target cell>Thresh_X,LowQ+Thresh_beam,LowQOr Srxlev of the target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

Thresh_X,LowPis the base threshold, Thresh, of Srxlev of the target cell_beam,LowPAn offset of Srxlev for the target cell; thresh_{beam Serving,LowQ}And Thresh_beam,LowQRespectively, the offset, Thresh, of the target cell reselection RSRQ threshold after introduction of multiple beams_{beamServing,LowQ}And Thresh_beam,LowPThe offset of the target cell reselection RSRP threshold after the multi-beam is introduced is respectively, the numerical value of the offset is a group of positive numbers or dB values corresponding to the beam numbers, and the more the beam numbers are, the larger the value is.

9. The method of cell reselection according to claim 4, wherein the step of reselecting to the target cell according to the first parameter of the source cell, the second parameter of the target cell, and the reselection condition for the terminal to reselect to the target cell comprises:

when the target cell is a pilot frequency or inter-system cell with low priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell, including:

if Srxlev of the source cell<Thresh_Serving,LowP-Thresh_{beam Serving,LowP}And Srxlev of the target cell>Thresh_X,LowP+Thresh_beam,LowPReselecting the target cell;

Thresh_X,LowPis the base threshold, Thresh, of Srxlev of the target cell_beam,LowPAn offset of Srxlev for the target cell; thresh_{beam Serving,LowP}And Thresh_beam,LowPThe offset of the target cell reselection RSRP threshold after introducing the multi-beam is a set of positive numbers or dB values corresponding to the beam numbers, and the larger the beam number is, the larger the value is.

10. The method of cell reselection according to claim 1, wherein the step of obtaining the reselection parameters when the terminal reselects from the source cell to the target cell comprises:

11. The method of cell reselection according to claim 1, wherein the step of reselecting to the target cell comprises one of:

when the reselected target cell comprises a plurality of cells with different priorities, selecting a cell with the highest priority for access;

12. A terminal, comprising:

a transceiver configured to obtain reselection parameters when a terminal reselects from a source cell to a target cell, where the target cell is configured with at least one beam, and the reselection parameters are related to the at least one beam, and the reselection parameters include: basic reselection time period Treselection_RATAnd/or a first parameter of the source cell, a preset target reselection time period and/or a second parameter of the target cell, wherein the preset target reselection time period is a basic reselection time period Treselection_RAT+Treselection_beam，Treselection_beamA preset reselection time offset associated with the at least one beam; the second parameter of the target cell includes: selecting a signal quality value Squal by a cell, selecting a received signal level strength value Srxlev by the cell, and relating to a beam of a target cell;

13. The terminal of claim 12, wherein the reselection parameter is related to at least one of:

the number of beams configured by the target cell;

14. The terminal of claim 12, wherein the preset target reselection time period is greater than a base reselection time period.

15. The terminal of claim 14, wherein the processor is configured to perform one of:

16. The terminal of claim 15, wherein the processor is configured to perform:

when the target cell is a pilot frequency or inter-system cell with high priority and the source cell provides a first preset threshold of a first parameter of the source cell, if a second parameter of the target cell exceeds a second preset threshold, reselecting the target cell;

the processor is configured to perform:

17. The terminal of claim 15, wherein the processor is configured to perform:

when the target cell is a high-priority pilot frequency or inter-system cell and the source cell does not provide a first preset threshold of the first parameter of the source cell, if a second parameter of the target cell exceeds a second preset threshold, reselecting the target cell;

the processor is configured to perform:

18. The terminal of claim 15, wherein the processor is configured to perform:

when the target cell and the source cell are pilot frequency cells with the same frequency or the same priority, ranking the source cell and the target cell according to the first parameter and the second parameter to obtain a best ranked target cell, and reselecting the target cell;

the processor is configured to perform:

ranking the source cell and the target cell by the following formula;

rating of source cell

Rating of target cells

Is Q_HystOf the source cell

A measurement bias for a source cell;

Is Q_offsetOf the target cell

A second measurement offset for the target cell;

19. The terminal of claim 15, wherein the processor is configured to perform:

when the target cell is a low-priority pilot frequency or inter-system cell and the source cell provides a first preset threshold of a first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and a second parameter of the target cell exceeds a second preset threshold, reselecting the target cell;

the processor is configured to perform:

among them, Thresh_Serving,LowQBase of Squal for source cellLow threshold, Thresh_{beam Serving,LowQ}Is the offset of the Squal of the source cell;

20. The terminal of claim 15, wherein the processor is configured to perform:

when the target cell is a pilot frequency or inter-system cell with low priority and the source cell does not provide a first preset threshold of the first parameter of the source cell, if the first parameter of the source cell is lower than the first preset threshold and the second parameter of the target cell exceeds a second preset threshold, reselecting the target cell;

the processor is configured to perform:

21. The terminal of claim 12, wherein the processor is configured to perform:

22. The terminal of claim 12, wherein the processor is configured to perform one of:

23. A method for cell reselection, applied to a network device, is characterized by comprising:

sending reselection parameters to a terminal when reselecting from a source cell to a target cell, wherein the target cell is configured with at least one beam, and the reselection parameters are related to the at least one beam, and comprise: basic reselection time period Treselection_RATAnd/or a first parameter of the source cell, a preset target reselection time period and/or a second parameter of the target cell, wherein the preset target reselection time period is a basic reselection time period Treselection_RAT+Treselection_beam，Treselection_beamA preset reselection time offset associated with the at least one beam; the second parameter of the target cell includes: the cell selects a signal quality value Squal and the cell selects a received signal level strength value Srxlev and is associated with the beam of the target cell.

24. The method of cell reselection according to claim 23, wherein said reselection parameter is related to at least one of:

the number of beams configured by the target cell;

25. The method of cell reselection according to claim 23, wherein the preset target reselection time period is greater than a base reselection time period.

26. The method of cell reselection according to claim 23, wherein the step of sending reselection parameters to the terminal when reselecting from the source cell to the target cell comprises:

27. A network device, comprising: a processor; a memory coupled to the processor, and a transceiver coupled to the processor; wherein the processor is configured to invoke and execute programs and data stored in the memory,

the transceiver is configured to send reselection parameters when reselecting from a source cell to a target cell to a terminal, where the target cell is configured with at least one beam, and the reselection parameters are related to the at least one beam, and the reselection parameters include: basic reselection time period Treselection_RATAnd/or a first parameter of the source cell, a preset target reselection time period and/or a second parameter of the target cell, wherein the preset target reselection time period is a basic reselection time period Treselection_RAT+Treselection_beam，Treselection_beamA preset reselection time offset associated with the at least one beam; the second parameter of the target cell includes: the cell selects a signal quality value Squal and the cell selects a received signal level strength value Srxlev and is associated with the beam of the target cell.

28. The network device of claim 27, wherein the reselection parameter is related to at least one of:

the number of beams configured by the target cell;

29. The network device of claim 27, wherein the preset target reselection time period is greater than a base reselection time period.

30. The network device of claim 27, wherein the transceiver is configured to perform:

31. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of cell reselection of any of claims 1-10, 23-26.