Mobile cell reselection method and terminal

Abstract

The present invention discloses a mobile cell reselection method and terminal. The method comprises: selecting candidate cells from a plurality of neighboring cells of a terminal; determining the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the terminal's position and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell; determining the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection. The scheme of the present application realizes accurate reselection of mobile cells in the Re l‑17 stage based on at least one of the three indicators: the remaining service time of each candidate cell, the distance between the terminal's position and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell.

Description

Technical Field

[0001] The present invention relates to the field of communications, and in particular to a mobile cell reselection method and a terminal. Background Art

[0002] In order to achieve seamless coverage of the global network, the research direction of mobile communications has further expanded to the vast space field, and developed towards an integrated space-space network. Therefore, 3GPP conducted research on non-terrestrial networks (NTN) in the Rel-16 stage and standardized some technologies of NTN in the Rel-17 stage. In particular, the cell reselection problem in NTN mobility management was discussed.

[0003] In the NTN satellite scenario, the satellite is in a high-speed moving state relative to the earth, and the cells covered by it on the earth's surface are also constantly moving with the satellite, which brings challenges to the terminal (UE) in the Id le state or Inactive state. In the Rel-16 stage, 3GPP divides cells into two categories: one is a fixed cell, which is fixed relative to the ground, and the other is a mobile cell, which is constantly moving relative to the ground. In the Rel-17 stage, 3GPP introduced the remaining service time and distance threshold of the serving cell to solve the problems existing in the cell reselection of fixed cells, but no consistent conclusion has been reached for the cell reselection of mobile cells. Summary of the invention

[0004] The embodiments of the present invention provide a mobile cell reselection method and a terminal, so as to at least solve the technical problem that there is no effective solution to the reselection of a mobile cell.

[0005] According to a first aspect of an embodiment of the present invention, a mobile cell reselection method is provided, comprising: selecting candidate cells from a plurality of neighboring cells of a terminal; determining a cell reselection priority of each candidate cell based on at least one of a remaining service time of each candidate cell, a distance between a position of the terminal and a reference position of each candidate cell, and a reference signal reception quality of each candidate cell; and determining the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection.

[0006] Optionally, the cell reselection priority of each candidate cell is determined according to at least one of the remaining service time of each candidate cell, the distance between the position of the terminal and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, including: determining a first cell reselection index according to a first weight value, a second weight value, a third weight value, the remaining service time of the candidate cell, the distance between the position of the terminal and the reference position of the candidate cell, and the reference signal reception quality of the candidate cell, wherein the first weight value is the degree of influence of the remaining service time of the candidate cell on the first cell reselection index, the second weight value is the degree of influence of the distance between the position of the terminal and the reference position of the candidate cell on the first cell reselection index, and the third weight value is the degree of influence of the reference signal reception quality of the candidate cell on the first cell reselection index; determining the cell reselection priority of the candidate cell according to the first cell reselection index, wherein the cell reselection priority is positively correlated with the first cell reselection index.

[0007] Optionally, the method further includes: adjusting the first weight value, the second weight value and the third weight value according to a service type of the terminal to meet service requirements.

[0008] Optionally, the method also includes: obtaining weight information of a target parameter of a target candidate cell, the target parameter including at least any one of a remaining service time of the target candidate cell, a distance between the position of the terminal and a reference position of the target candidate cell, and a reference signal reception quality of the target candidate cell; determining an entropy value of the target parameter based on the weight information; and determining a weight value of the target parameter of the target candidate cell based on the entropy value.

[0009] Optionally, the cell reselection priority of each candidate cell is determined based on at least one of the remaining service time of each candidate cell, the distance between the position of the terminal and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, including: determining to select one or more indicators from the three indicators of the remaining service time of the candidate cell, the distance between the position of the terminal and the reference position of the candidate cell, and the reference signal reception quality of the candidate cell according to the service type of the terminal; and determining the cell reselection probability of each candidate cell according to the selected one or more indicators, wherein the cell reselection priority is determined based on the cell reselection probability and is positively correlated with the cell reselection probability.

[0010] Optionally, a candidate cell is selected from multiple neighboring cells of the terminal, including: selecting a candidate cell from multiple neighboring cells based on the distance between the position of the terminal and the reference position of the neighboring cell, and / or, based on R value range information; wherein the neighboring cell whose distance between the position of the terminal and the reference position of the neighboring cell is less than or equal to the distance threshold of cell reselection is selected as the candidate cell, and the neighboring cell whose R value is in the range of [Rbest-RTBC, Rbest] is selected as the candidate cell, wherein Rbest represents the optimal R value, and RTBC represents the R value range information.

[0011] Optionally, the method also includes: determining the remaining service time of the current service cell based on auxiliary information in the system information and the position of the terminal, the auxiliary information including satellite-related information and cell-related information; upon obtaining a distance threshold of the current service cell, obtaining the distance between the position of the terminal and a reference position of the current service cell, wherein the distance threshold of the current service cell is determined based on the cell-related information, and the reference position of the current service cell is determined based on the satellite-related information; and upon the distance between the position of the terminal and the reference position of the current service cell being greater than or equal to the distance threshold of the current service cell, performing the mobile cell measurement again.

[0012] Optionally, determining the remaining service time of the current service cell according to the auxiliary information in the system information and the position of the terminal includes: obtaining a first surface arc distance between a first position point and a second position point, and a second surface arc distance between the second position point and a third position point, wherein the first position point is the position of the terminal, the second position point is the position point on the movement path of the terminal that is closest to the third position point, and the third position point is the reference position of the current service cell; determining a third surface arc distance according to the first surface arc distance and the second surface arc distance, and the third surface arc distance is the reference position of the current service cell. The surface arc distance between the first position point and the third position point, wherein the first surface arc distance, the second surface arc distance and the third surface arc distance are all functions of time t; the first time and the second time are determined twice according to the third surface arc distance, wherein the third surface arc distance selected when determining the first time is the third surface arc distance determined in real time as the time t changes, and the third surface arc distance selected when determining the second time is the radius of the current service cell; the difference between the second time and the first time is determined as the remaining service time of the current service cell.

[0013] According to a second aspect of an embodiment of the present invention, a mobile cell reselection method is provided, comprising: sending system information to a terminal, the auxiliary information in the system information comprising satellite-related information and cell-related information, so that the terminal determines the distance between the terminal's position and the reference position of the neighboring cell according to the auxiliary information corresponding to the neighboring cell, so that the terminal determines the remaining service time of the candidate cell according to the auxiliary information and the terminal's position, so that the terminal determines the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the terminal's position and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, and determines the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection.

[0014] According to a third aspect of an embodiment of the present invention, a terminal is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include means for executing any one of the methods described.

[0015] In an embodiment of the present invention, a candidate cell is selected from a plurality of neighboring cells of a terminal; a cell reselection priority of each candidate cell is determined according to at least one of the remaining service time of each candidate cell, the distance between the location of the terminal and the reference location of each candidate cell, and the reference signal reception quality of each candidate cell; and the candidate cell with the highest cell reselection priority is determined as the optimal cell for cell reselection. The solution of the present application realizes accurate reselection of mobile cells in the Rel-17 stage based on at least one of the three indicators: the remaining service time of each candidate cell, the distance between the location of the terminal and the reference location of each candidate cell, and the reference signal reception quality of each candidate cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 is a flow chart of a mobile cell reselection method according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of an application scenario of the mobile cell reselection method according to an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of relative positions of a satellite and a terminal according to an embodiment of the present invention;

[0020] Figure 4 is an optional remaining service time analysis schematic diagram according to an embodiment of the present invention;

[0021] Figure 5 is a flow chart of starting cell reselection measurement according to an embodiment of the present invention;

[0022] Figure 6 is a cell reselection decision flow chart according to an embodiment of the present invention;

[0023] Figure 7 It is a schematic diagram of a mobile cell reselection device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] According to an embodiment of the present invention, an embodiment of a mobile cell reselection method is provided. The method is applied to a terminal. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0027] Figure 1 A mobile cell reselection method according to an embodiment of the present invention is as follows. Figure 1 As shown, the method comprises the following steps:

[0028] Step S102, selecting a candidate cell from a plurality of neighboring cells of the terminal;

[0029] Step S104, determining a cell reselection priority of each candidate cell according to at least one of a remaining service time of each candidate cell, a distance between the position of the terminal and a reference position of each candidate cell, and a reference signal reception quality of each candidate cell;

[0030] Step S106: Determine the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection.

[0031] The mobile cell reselection method executed in the terminal of the present application selects candidate cells from multiple neighboring cells of the terminal, determines the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the position of the terminal and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, and determines the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection. Based on at least one of the three indicators of the remaining service time of each candidate cell, the distance between the position of the terminal and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, accurate reselection of mobile cells is achieved in the Rel-17 stage.

[0032] The application scenarios of this application are as follows Figure 2 As shown: According to the NTN architecture in 3GPP, a mobile cell reselection network architecture based on LEO satellite is proposed, such as Figure 2 As shown in . The NG-RAN side consists of LEO satellite, UE and ground gateway. LEO satellite is connected to the ground gateway through a feeder link and to the UE through the NR-Uu interface. In the mobile cell scenario, the cell moves relative to the ground following the satellite. As the satellite moves, the UE will be in different satellite coverage areas, so it is necessary to reselect the cell in time. The ground gateway acts as a relay to connect the LEO satellite to the core network (CN). CN is mainly the access and mobility management function entity (AMF), which is responsible for handling connection and mobility management tasks.

[0033] Further, step S104, determining the cell reselection priority of each of the candidate cells according to at least one of the remaining service time of each of the candidate cells, the distance between the position of the terminal and the reference position of each of the candidate cells, and the reference signal reception quality of each of the candidate cells, includes:

[0034] Step S1041, determining a first cell reselection index according to a first weight value, a second weight value, a third weight value, the remaining service time of the candidate cell, the distance between the position of the terminal and the reference position of the candidate cell, and the reference signal reception quality of the candidate cell, wherein the first weight value is the influence degree of the remaining service time of the candidate cell on the first cell reselection index, the second weight value is the influence degree of the distance between the position of the terminal and the reference position of the candidate cell on the first cell reselection index, and the third weight value is the influence degree of the reference signal reception quality of the candidate cell on the first cell reselection index; specifically, H=w1×X-w2×Y+w3×Z, wherein X is the remaining service time of the candidate cell, Y is the distance between the position of the terminal and the reference position of the candidate cell, and Z is the reference signal reception quality of the candidate cell, w1, w2, and w3 are respectively the first weight value, the second weight value, and the third weight value of the candidate cell; Step S1042, determining a cell reselection priority of the candidate cell according to the first cell reselection index, wherein the cell reselection priority is positively correlated with the first cell reselection index. Specifically, the candidate cell corresponding to the maximum value of the first cell reselection index may be determined as the optimal cell.

[0035] In addition, the method also includes: adjusting the first weight value, the second weight value and the third weight value according to the service type of the terminal to meet the service requirements. Specifically, the priorities of the remaining service time of the candidate cell, the distance between the position of the terminal and the reference position of the candidate cell, and the reference signal reception quality of the candidate cell are determined according to the service type of the terminal, and the weights corresponding to the parameters with high priority are set higher, and the weights corresponding to the parameters with low priority are set lower. For example, for services with high stability requirements, the UE needs to reselect to a cell with a long service time, and the weight value of the remaining service time can be increased; for services with high rate requirements, the UE needs to reselect to a cell with good received signal quality, and the weight value of the received signal quality can be increased.

[0036] Specifically, the method also includes: obtaining weight information of the target parameter of the target candidate cell, the target parameter including at least any one of the remaining service time of the target candidate cell, the distance between the position of the terminal and the reference position of the target candidate cell, and the reference signal reception quality of the target candidate cell; determining the entropy value of the target parameter according to the weight information; and determining the weight value of the target parameter of the target candidate cell according to the entropy value.

[0037] Specifically, entropy weight can reflect the magnitude of parameter changes, thereby highlighting indicators with larger differences and weakening indicators with smaller differences. Therefore, the entropy weight method is used to calculate the weights. The remaining service time of the neighboring cell, the reference position with the neighboring cell, and the quality of the neighboring cell received signal are used as the three indicators of the candidate cell. X, Y, and Z are their corresponding indicator values. After normalizing X, Y, and Z, the detailed steps for calculating the entropy weight are as follows:

[0038] First, calculate the weight information p of index j of candidate cell i ij :

[0039]

[0040] Among them, a ij is the value of index j of candidate cell i, and m is the number of candidate cells.

[0041] Then, according to the attribute value weight information p ij Calculate the entropy value of indicator j:

[0042]

[0043] Where k is a constant,

[0044] According to the entropy value E j Calculate the entropy weight of indicator j:

[0045]

[0046] Finally, the weights w1, w2, and w3 can be obtained. Of course, the fourth weight value a and the fifth weight value b can be calculated using the above method;

[0047] Furthermore, the cell reselection priority of each of the candidate cells is determined based on at least one of the remaining service time of each of the candidate cells, the distance between the position of the terminal and the reference position of each of the candidate cells, and the reference signal reception quality of each of the candidate cells, including: determining, based on the service type of the terminal, to select one or more indicators from the three indicators of the remaining service time of the candidate cell, the distance between the position of the terminal and the reference position of the candidate cell, and the reference signal reception quality of the candidate cell; and determining the cell reselection probability of each of the candidate cells based on the selected one or more indicators, wherein the cell reselection priority is determined based on the cell reselection probability and is positively correlated with the cell reselection probability.

[0048] For example, terminal UE services can be divided into high-stability services and high-reliability services. UEs with high-stability services require fewer reselections and have stable communication quality, such as voice call users, online live broadcast users, etc. For such UEs, the remaining service time is given priority, which can increase the probability of reselecting cells with longer remaining service time for UEs with high-stability services. UEs with high-reliability services require high transmission rates, such as online video caching, online video uploading, etc. For such UEs, the reference signal reception quality is given priority, which can increase the probability of reselecting cells with better reception signal quality for UEs with high-reliability services. Specifically, statistical distribution processing is performed on at least one of the remaining service time of each candidate cell, the distance between the position of the terminal and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell to obtain the candidate cell reselection probability of each candidate cell; for example, the Poisson cumulative distribution function is used for calculation;

[0049] Specifically, selecting a candidate cell from a plurality of neighboring cells of the terminal includes: selecting a candidate cell from a plurality of neighboring cells according to the distance between the position of the terminal and a reference position of the neighboring cell, and / or, according to R value range information; wherein, the neighboring cell whose distance between the position of the terminal and the reference position of the neighboring cell is less than or equal to the distance threshold of cell reselection is taken as the candidate cell, and the neighboring cell whose R value is within the range of [Rbest-RTBC, Rbest] is taken as the candidate cell, wherein Rbest represents the optimal R value, and RTBC represents the R value range information. Specifically, the R value is obtained by sorting using the R criterion; wherein, the R value range information is rangeToBestCell, and a cell is selected according to the R value range information rangeToBestCell;

[0050] In order to determine the distance between the position of the terminal and the reference position of the neighboring cell, before selecting a candidate cell from multiple neighboring cells based on the distance between the position of the terminal and the reference position of the neighboring cell, and / or based on R value range information, the method also includes: determining whether the neighboring cell broadcasts auxiliary information corresponding to the neighboring cell, the auxiliary information including satellite-related information and cell-related information; in the case where the neighboring cell broadcasts the auxiliary information corresponding to the neighboring cell, determining the distance between the position of the terminal and the reference position of the neighboring cell based on the auxiliary information corresponding to the neighboring cell.

[0051] In some embodiments, the method further includes: if the neighboring cell does not broadcast the auxiliary information corresponding to the neighboring cell, taking the neighboring cell as the candidate cell.

[0052] In a mobile cell, the cell moves with the satellite. UEs at different locations in the cell leave the cell at different times. Therefore, the remaining service time of UEs at different locations in the cell is different. The remaining service time of the service cell broadcast by the network is for the entire cell, not for a specific UE, so it is not applicable to all UEs in the cell. In the NTN scenario, the distance between the satellite and the ground is much larger than the radius of the cell, resulting in little difference in RSRP between the center and the edge of the cell. Therefore, it is not enough to use only the traditional R criterion sorting in cell reselection. Furthermore, a candidate cell is selected from a plurality of neighboring cells based on the distance between the position of the terminal and the reference position of the neighboring cell and based on the R value range information, including: when the neighboring cell broadcasts the auxiliary information corresponding to the neighboring cell, obtaining the distance between the position of the terminal and the reference position of the neighboring cell, and taking the neighboring cell whose distance between the position of the terminal and the reference position of the neighboring cell is less than or equal to the distance threshold of the cell reselection as the initial candidate cell, or, when the neighboring cell does not broadcast the auxiliary information corresponding to the neighboring cell, taking the neighboring cell as the initial candidate cell; introducing a distance threshold broadcast by the network to assist UE at the edge to measure the neighboring cell; using the R criterion to sort the initial candidate cells, and taking the initial candidate cell whose R value is in the range of [Rbest-RTBC, Rbest] as the secondary candidate cell.

[0053] The R value can be calculated by the following formula: s =Q meas,s +Q hyst -Qoffset temp ; R n =Q meas,n -Qoffset-Qoffset temp ; where R s is the R value of the serving cell; R n is the R value of the neighboring cell; Q hyst is the hysteresis value of the sorting criterion; Q meas is the cell RSRP value used for cell reselection; for intra-frequency reselection, Qoffset is Qoffset,n between cells; for inter-frequency reselection, Qoffset is Qoffestfrequency between frequencies + Qoffset,n between cells; Qoffset temp That is, the first selection is performed based on the distance between the position of the terminal and the reference position of the neighboring cell, and the second selection is performed based on the R criterion, so as to further ensure that a more suitable candidate cell is selected.

[0054] In order to achieve accurate selection of mobile cells, after selecting candidate cells from multiple neighboring cells according to R value range information, the method also includes: obtaining the remaining service time of each candidate cell and the distance between the position of the terminal and the reference position of each candidate cell; determining the second cell reselection index according to the fourth weight value, the fifth weight value, the remaining service time of the candidate cell and the distance between the position of the terminal and the reference position of the candidate cell, wherein the fourth weight value is the influence of the remaining service time of the candidate cell on the second cell reselection index, and the fifth weight value is the influence of the distance between the position of the terminal and the reference position of the candidate cell on the second cell reselection index; and selecting the optimal cell from the multiple candidate cells according to the second cell reselection index.

[0055] For example, H=a×Xb×Y, where X is the remaining service time of the candidate cell, Y is the distance between the terminal's location and the reference location of the candidate cell, a and b are the fourth weight value and the fifth weight value, respectively, wherein the weight can be obtained by the entropy weight method, and the reference value can be set for normalization. That is, in the scheme of selecting candidate cells from multiple neighboring cells based only on the R value range information, two weight values ​​can be set to select the optimal cell. The UE can reselect to the cell with the highest H value, or the UE can reselect to any cell with an H value greater than or equal to a preset threshold. That is to say, considering only the two parameters of the remaining service time of the candidate cell and the distance between the terminal's location and the reference location of the candidate cell is applicable to the situation where the candidate cell is screened out based on the R value range information.

[0056] In addition, the method also includes: determining the remaining service time of the current service cell based on the auxiliary information in the system information and the position of the terminal, the auxiliary information including satellite-related information and cell-related information; when the distance threshold of the current service cell is obtained, obtaining the distance between the position of the terminal and the reference position of the current service cell, wherein the distance threshold of the current service cell is determined based on the cell-related information, and the reference position of the current service cell is determined based on the satellite-related information; when the distance between the position of the terminal and the reference position of the current service cell is greater than or equal to the distance threshold of the current service cell, performing the mobile cell measurement again.

[0057] Furthermore, the remaining service time of the current service cell is determined based on the auxiliary information in the system information and the position of the terminal, the auxiliary information including satellite-related information and cell-related information; the remaining time of the current service cell and the distance threshold can assist the UE to timely perform neighboring cell measurements and reduce UE energy consumption, including: obtaining a first surface arc distance between a first position point and a second position point, and a second surface arc distance between the second position point and a third position point, the first position point being the position of the terminal, the second position point being the position point on the movement path of the terminal that is closest to the third position point, and the third position point being the reference position of the current service cell; according to the first surface arc distance and the second surface arc distance, the second surface arc distance between the second position point and the third position point is obtained. The first time and the second time are determined twice according to the third surface arc distance, wherein the third surface arc distance selected when determining the first time is the third surface arc distance determined in real time as time t changes, and the third surface arc distance selected when determining the second time is the radius of the current service cell; the difference between the second time and the first time is determined as the remaining service time of the current service cell.

[0058] In the mobile cell scenario, the specific steps for calculating the remaining service time are as follows:

[0059] like Figure 3 As shown, point S is the reference position of the cell, point U is the location of the terminal UE, and a s is the angle between the cell moving direction and the equatorial plane, a u is the angle between the UE moving direction and the equatorial plane. The angle between the moving direction and the equatorial plane ranges from [-π,π]; for a mobile UE, the UE is based on its own moving speed v u , the angle a between the moving direction and the equatorial plane u , and the cell's moving speed v s , the angle a between the moving direction and the equatorial plane s , calculate the UE's moving speed vr relative to the cell and the angle a between the moving direction and the equatorial plane r For a stationary UE, the moving speed v of the UE relative to the cell is r is the moving speed v of the cell s , the angle a between the moving direction and the equatorial plane r is π+a s .

[0060] like Figure 4 As shown, S is the reference position of the satellite (subsatellite point) (E s ,Ns ), E s is the longitude of the cell reference location, N s is the latitude of the cell reference location. The location of the terminal UE is U(E u ,N u ), E u is the longitude of the UE location, N u is the latitude of the UE. Q is the point on the UE motion path closest to S. d(t) represents the arc distance between U and S. g(t) represents the arc distance between Q and U, which can be calculated based on the UE's relative cell moving speed v. u Get. min is the surface arc distance between Q and S, which can be calculated based on the satellite reference position S(E s ,N s ), UE position U(E u ,N u ) and the angle a between the UE's moving direction relative to the cell and the equatorial plane v Conclude.

[0061] According to the spherical triangle formed by the three points Q, U, and S, d(t) can be obtained through the following geometric relationship:

[0062] d(t)=cos -1 (cosg(t)*cosd min )

[0063] When the UE is at position U, the remaining service time of the cell is obtained in the following way: first, calculate the distance d0 between the UE position U and the satellite reference position S, set d(t) = d0, and get t = t1; secondly, set d(t) equal to the cell radius, that is, when the distance between the UE and the satellite reference position is the largest, t = t2; thus, the remaining service time of the cell is t2-t1.

[0064] Obtain a cell selection reception value Srx lev and a cell selection quality value Squa l of the current serving cell, where the cell selection reception value is calculated based on a reference signal received power RSRP, and the cell selection quality value is calculated based on a reference signal received quality RSRQ; that is, determine a time for cell reselection based on a remaining service time of the current serving cell; and determine whether to directly perform mobile cell measurement based on the cell selection reception value and the cell selection quality value before the end of the remaining service time of the current serving cell.

[0065] More specifically, the cell selection reception value S of the current serving cell is obtained. rxlev, including: obtaining the RSRP of the current serving cell, the minimum receiving strength requirement of the RSRP in the current serving cell, the offset value of the minimum receiving strength requirement of the RSRP, the compensation value of the selected receiving value and the temporary offset value, wherein the compensation value of the selected receiving value is determined by a first maximum uplink transmit power, a second maximum uplink transmit power and a third maximum uplink transmit power, the first maximum uplink transmit power refers to the maximum uplink transmit power allowed by the terminal in the current serving cell, the second maximum uplink transmit power refers to the maximum uplink transmit power allowed by the terminal in the current serving cell, and the third maximum uplink transmit power is the maximum uplink transmit power determined by the power level capability of the terminal; determining the cell selection receiving value according to the RSRP of the current serving cell, the minimum receiving strength requirement of the RSRP in the current serving cell, the offset value of the minimum receiving strength requirement of the RSRP, the compensation value of the selected receiving value and the temporary offset value; obtaining the cell selection quality value S of the current serving cell qual , including: obtaining the RSRQ of the current serving cell, the minimum receiving strength requirement of the RSRQ in the current serving cell, the offset value of the minimum receiving strength requirement of the RSRQ, and the temporary offset value; determining the cell selection quality value according to the RSRQ of the current serving cell, the minimum receiving strength requirement of the RSRQ in the current serving cell, the offset value of the minimum receiving strength requirement of the RSRQ, and the temporary offset value. Among them, the cell selection reception value S rxlev and cell selection quality value S qual It can be calculated by the following formula:

[0066] S rxlev =Q rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–P compensation -Qoffset temp ;

[0067] S qual =Q qualmeas –(Q qualmin +Q qualminoffset )–Qoffset temp ;

[0068] Among them, S rxlev is the cell selection reception value; S qual is the cell selection quality value; Q rxlevmeas is the RSRP value of the measurement cell (which can be the current serving cell); Q qualmeas is the RSRQ value of the measured cell; Q rxlevminis the minimum RSRP receiving strength requirement in the cell, obtained from the broadcast information SIB; Q qualmin is the minimum receiving strength requirement of RSRQ in the cell; Q rxlevminoffset For the signal Q rxlevmin The offset value performed; Q qualminoffset For the signal Q qualmin The offset value to be performed; Qoffset temp is a temporary offset value; if the UE supports additionalPmax in NS-PmaxList in the system information,

[0069] P compensation =max(P EMAX1 -P PowerClass ,0)-(min(P EMAX2 ,P PowerClass )-min(P EMAX1 ,P PowerClass )), otherwise P compensation =max(P EMAX1 -P PowerClass ,0),P EMAX1 is the maximum uplink transmission power allowed by the terminal in the cell, obtained from p-Max in the broadcast message, P EMAX2 is the maximum uplink transmission power allowed by the terminal in the cell, P PowerClass It is the maximum uplink transmit power determined by the UE power level capability.

[0070] Furthermore, determining whether to directly perform mobile cell reselection based on the cell selection reception value and the cell selection quality value includes: obtaining a cell selection reception value threshold and a cell selection quality value threshold; determining whether the cell selection reception value is greater than the cell selection reception value threshold, and whether the cell selection quality value is greater than the cell selection quality value threshold; when the cell selection reception value is greater than the cell selection reception value threshold, and the cell selection quality value is greater than the cell selection quality value threshold, determining not to directly perform the mobile cell reselection; when the cell selection reception value is less than or equal to the cell selection reception value threshold, and / or the cell selection quality value is less than or equal to the cell selection quality value threshold, determining to directly perform the mobile cell reselection.

[0071] Furthermore, when the cell selection reception value is greater than the cell selection reception value threshold, and the cell selection quality value is greater than the cell selection quality value threshold, it is determined not to directly perform the mobile cell reselection, including: when the distance threshold of the current serving cell is obtained, obtaining the distance between the position of the terminal and the reference position of the current serving cell; when the distance between the position of the terminal and the reference position of the current serving cell is greater than or equal to the distance threshold, performing the mobile cell reselection.

[0072] In some embodiments, before determining the remaining service time of the current service cell based on the auxiliary information and terminal location information in the system information, the method also includes: acquiring the system information; determining whether the frequency priority of the neighboring cell is higher than the frequency priority of the current service cell; and determining whether the auxiliary information is included in the system information if the frequency priority of the neighboring cell is lower than or equal to the frequency priority of the current service cell.

[0073] In some embodiments, after determining whether the frequency priority of the neighboring cell is higher than the frequency priority of the current serving cell, the method further includes: directly reselecting the mobile cell if the frequency priority of the neighboring cell is higher than the frequency priority of the current serving cell.

[0074] The embodiment of the present invention provides a specific mobile cell reselection method, including two parts: cell reselection measurement initiation and reselection decision. The measurement initiation is that the UE measures the current serving cell and the neighboring cell to determine whether cell reselection is required. The cell reselection decision is that the UE measures the neighboring cell to determine the best cell, and then reselects to the best cell.

[0075] 1) Cell reselection measurement starts Figure 5 As shown, the following steps are included:

[0076] Step 201: The network (ie, the network side) broadcasts system information to the terminal UE.

[0077] Step 202: The UE obtains the frequency priority of the neighboring cell and compares the priority of the neighboring cell with the priority of the current serving cell. If the neighboring cell priority is higher than the current serving cell, the UE directly measures the neighboring cell and proceeds to step 210; if the neighboring cell priority is less than or equal to the current serving cell, it is necessary to perform measurement and judgment and proceed to step 203.

[0078] Step 203: If the system information contains auxiliary information (satellite ephemeris information (i.e. satellite related information), cell related information (including cell reference position and cell radius, etc.)), proceed to step 204, and the UE calculates the remaining service time of the current serving cell; otherwise, proceed to step 205, and the UE directly measures the neighboring cell.

[0079] Step 204: The UE can obtain auxiliary information (satellite ephemeris information, cell reference position and cell radius, etc.) from the system information broadcast by the network. The UE can infer the moving speed v of the satellite based on the satellite ephemeris information. s and the angle a between the moving direction and the equatorial plane s , which is equivalent to the angle a between the moving speed and moving direction of the service cell and the equatorial plane s .

[0080] Step 205: The UE measures the serving cell, obtains RSRP and RSRQ values, and then calculates S according to the S criterion. rxlev and S qual .

[0081] Step 206: S measured by the UE rxlev and S qual and the measurement threshold S of network broadcast P and S Q For comparison, if S rxlev >S P And S qual >S Q , it is necessary to continue to determine whether the UE needs to perform cell reselection, and enter step 207; otherwise, the UE needs to perform cell measurement, and enter step 210.

[0082] Step 207: If the distance threshold of the serving cell is broadcasted in the network, whether to perform cell measurement is determined by the distance threshold, and the process proceeds to step 208; otherwise, the UE does not need to perform cell measurement, and the process proceeds to step 205.

[0083] Step 208: The UE calculates the distance between the UE and the reference position of the serving cell.

[0084] Step 209: Compare the distance between the UE and the serving cell reference position with the distance threshold. If the distance between the UE and the serving cell reference position is less than the distance threshold, the UE does not need to perform cell measurement and proceeds to step 205; otherwise, the UE needs to perform cell measurement and proceeds to step 210.

[0085] Step 210: The UE measures the cell.

[0086] 2) Re-election judgment

[0087] Figure 6This is a flowchart of cell reselection decision, the specific steps are as follows:

[0088] Step 301: UE performs cell measurement.

[0089] Step 302: If the network broadcasts the distance threshold for cell reselection, the neighboring cells are screened by distance, and the process proceeds to step 303. Otherwise, the neighboring cells are not screened by distance, and the process proceeds to step 306.

[0090] Step 303: If the neighboring cell broadcasts the reference position, the neighboring cell is screened by calculating the distance, and the process goes to step 304; otherwise, the neighboring cell does not need to calculate the distance, and the process goes to step 305.

[0091] Step 304: The UE calculates the distance between the UE and the reference position of the neighboring cell, removes the neighboring cells whose distance is greater than the distance threshold, and retains the neighboring cells whose distance is less than or equal to the distance threshold.

[0092] Step 305: Retain the neighboring cell

[0093] Step 306: If the network broadcasts rangeToBestCell, proceed to step 307; otherwise, the UE uses the R criterion to sort the cells and proceed to step 308. Step 307: The UE sorts the neighboring cells according to the R criterion, and the R value is in [R best -rangeToBestCell,R best ] as candidate cells, where R best is the value with the highest R value among the candidate cells. Then the cell reselection scheme is adopted.

[0094] Step 308: The UE uses the cells reserved in steps 304 and 305 as candidate cells. The UE can reselect to the cell with the highest value of H = w1×X-w2×Y+w3×Z, or the UE can reselect to any cell with an H value greater than or equal to a preset threshold. Alternatively, the UE sorts the neighboring cells by the R criterion, and then screens the neighboring cells by rangeToBestCell to confirm the candidate cells, as in step 307. The remaining service time and the distance to the reference position are weighted to select the optimal cell.

[0095] The solution of the present application is applied to scenarios where a cell needs to continuously reselect a cell when it is in an idle state or an inactive state. In order to reside in a cell with a higher priority or a cell with better signal quality. The network side can divide different reselection priorities according to different frequencies, and this information is broadcast by the network side to the UE. The cell reselection process in the two cases is similar, the difference is that the UE needs to give priority to cells with high frequency priority in the reselection of inter-frequency cells. The solution for determining the selected cell list of the present application can reduce the sorting evaluation during the UE cell reselection process. The mobile cell reselection method of the present application is applied to the NTN scenario. First, the network side provides satellite information (satellite speed, cell radius and cell reference position) to assist UE in calculating the remaining service time of the current serving cell and deciding the time for cell reselection. Secondly, the current serving cell distance threshold is introduced to assist UE at the cell edge to measure neighboring cells, thereby reducing UE energy consumption during cell reselection. Then, the neighboring cell distance threshold is introduced to construct a candidate cell list, thereby reducing the ranking evaluation based on the R criterion during UE cell reselection. Finally, in the UE candidate cell list, the remaining service time of the candidate neighboring cells, the distance between the UE and the reference position and the received signal quality are comprehensively considered, and the optimal reselected cell is decided based on the needs of different service users.

[0096] The mobile cell reselection method of the present application comprehensively considers the remaining service time of candidate neighboring cells, the distance between UE and reference location and the received signal quality to determine the optimal candidate cell based on user needs. In different situations, the UE can adopt different schemes to determine the optimal reselected cell in the candidate cell list based on multi-dimensional parameters and different service needs of users.

[0097] The embodiment of the present application provides a terminal for executing the above-mentioned mobile cell reselection method, such as Figure 7 As shown, it includes: a selection unit 71, used to select candidate cells from multiple neighboring cells of the terminal; a first determination unit 72, used to determine the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the position of the terminal and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell; a second determination unit 73, used to determine the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection.

[0098] In the terminal of the present application, the selection unit selects candidate cells from multiple neighboring cells of the terminal, the first determination unit determines the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the location of the terminal and the reference location of each candidate cell, and the reference signal reception quality of each candidate cell, and the second determination unit determines the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection. Based on at least one of the three indicators of the remaining service time of each candidate cell, the distance between the location of the terminal and the reference location of each candidate cell, and the reference signal reception quality of each candidate cell, accurate reselection of mobile cells is achieved in the Rel-17 stage.

[0099] Further, the first determination unit includes a first determination module and a second determination module, the first determination module is used to determine the first cell reselection index according to a first weight value, a second weight value, a third weight value, the remaining service time of the candidate cell, the distance between the position of the terminal and the reference position of the candidate cell, and the reference signal reception quality of the candidate cell, wherein the first weight value is the degree of influence of the remaining service time of the candidate cell on the first cell reselection index, the second weight value is the degree of influence of the distance between the position of the terminal and the reference position of the candidate cell on the first cell reselection index, and the third weight value is the degree of influence of the reference signal reception quality of the candidate cell on the first cell reselection index; the second determination module is used to determine the cell reselection priority of the candidate cell according to the first cell reselection index, wherein the cell reselection priority is positively correlated with the first cell reselection index.

[0100] Further, the terminal also includes: an adjustment unit, used to adjust the first weight value, the second weight value and the third weight value according to the service type of the terminal to meet the service requirements. Further, the terminal also includes: a first acquisition unit, used to acquire weight information of the target parameter of the target candidate cell, the target parameter at least including any one of the remaining service time of the target candidate cell, the distance between the position of the terminal and the reference position of the target candidate cell, and the reference signal reception quality of the target candidate cell; a third determination unit, used to determine the entropy value of the target parameter according to the weight information; a fourth determination unit, used to determine the weight value of the target parameter of the target candidate cell according to the entropy value.

[0101] In some schemes, the first determination unit includes a third determination module and a fourth determination module, the third determination module is used to determine, according to the service type of the terminal, one or more indicators from three indicators: the remaining service time of the candidate cell, the distance between the terminal's location and the reference location of the candidate cell, and the reference signal reception quality of the candidate cell; the fourth determination module is used to determine the cell reselection probability of each of the candidate cells according to the selected one or more indicators, wherein the cell reselection priority is determined according to the cell reselection probability and is positively correlated with the cell reselection probability.

[0102] In some schemes, the selection unit is also used to select a candidate cell from multiple neighboring cells based on the distance between the position of the terminal and the reference position of the neighboring cell, and / or based on the R value range information; wherein the neighboring cell whose distance between the position of the terminal and the reference position of the neighboring cell is less than or equal to the distance threshold of the cell reselection is selected as the candidate cell, and the neighboring cell whose R value is in the range of [Rbest-RTBC, Rbest] is selected as the candidate cell, wherein Rbest represents the optimal R value, and RTBC represents the R value range information.

[0103] In some schemes, the terminal also includes: a fifth determination unit, used to determine the remaining service time of the current service cell based on auxiliary information in the system information and the position of the terminal, the auxiliary information including satellite-related information and cell-related information; a second acquisition unit, used to obtain the distance between the position of the terminal and the reference position of the current service cell when the distance threshold of the current service cell is obtained, wherein the distance threshold of the current service cell is determined based on the cell-related information, and the reference position of the current service cell is determined based on the satellite-related information; a measurement unit, used to perform the mobile cell measurement when the distance between the position of the terminal and the reference position of the current service cell is greater than or equal to the distance threshold of the current service cell.

[0104] In some schemes, the fifth determination unit includes: an acquisition module, used to acquire a first surface arc distance between a first position point and a second position point, and a second surface arc distance between the second position point and a third position point, wherein the first position point is the position of the terminal, the second position point is the position point on the movement path of the terminal that is closest to the third position point, and the third position point is the reference position of the current service cell; a fifth determination module, used to determine a third surface arc distance based on the first surface arc distance and the second surface arc distance, and the third surface arc distance is the distance between the first position point and the third position point. The first surface arc distance, the second surface arc distance and the third surface arc distance are all functions of time t; a sixth determination module is used to determine the first time and the second time twice according to the third surface arc distance, wherein the third surface arc distance selected when determining the first time is the third surface arc distance determined in real time as time t changes, and the third surface arc distance selected for determining the second time is the radius of the current service cell; a seventh determination module is used to determine the difference between the second time and the first time as the remaining service time of the current service cell.

[0105] An embodiment of the present application also provides a terminal, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include methods for executing any one of the methods described.

[0106] An embodiment of the present application also provides a mobile cell reselection method applied to a service end, comprising: sending system information to a terminal, the auxiliary information in the system information comprising satellite-related information and cell-related information, so that the terminal determines the distance between the terminal's position and the reference position of the neighboring cell according to the auxiliary information corresponding to the neighboring cell, so that the terminal determines the remaining service time of the candidate cell according to the auxiliary information and the terminal's position, so that the terminal determines the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the terminal's position and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, and determines the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection.

[0107] The mobile cell reselection method applied to the service end of the present application transmits system information to the terminal. Since the auxiliary information in the system information includes satellite-related information and cell-related information, the terminal determines the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the position of the terminal and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, and determines the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection. Accurate reselection of mobile cells in the Rel-17 stage is achieved.

[0108] An embodiment of the present application provides a service end, i.e., a network side device, comprising: a sending unit, configured to send system information to a terminal, wherein the auxiliary information in the system information comprises satellite-related information and cell-related information, so that the terminal determines the distance between the terminal's position and the reference position of the neighboring cell according to the auxiliary information corresponding to the neighboring cell, so that the terminal determines the remaining service time of the candidate cell according to the auxiliary information and the terminal's position, so that the terminal determines the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the terminal's position and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, and determines the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection.

[0109] An embodiment of the present invention provides a terminal, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include means for executing the above-mentioned method.

[0110] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments. In the above embodiments of the present invention, the descriptions of each embodiment have their own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There can be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms. The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it can be located in one place, or it can be distributed on multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, each functional unit in each embodiment of the present invention can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program code.

[0111] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A mobile cell reselection method, characterized in that: include: Selecting a candidate cell from a plurality of neighboring cells of the terminal; determining a cell reselection priority of each of the candidate cells according to at least one of a remaining service time of each of the candidate cells, a distance between a position of the terminal and a reference position of each of the candidate cells, and a reference signal reception quality of each of the candidate cells; Determining the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection; Wherein, determining the cell reselection priority of each of the candidate cells according to at least one of the remaining service time of each of the candidate cells, the distance between the position of the terminal and the reference position of each of the candidate cells, and the reference signal reception quality of each of the candidate cells includes: Determine a first cell reselection index according to a first weight value, a second weight value, a third weight value, a remaining service time of the candidate cell, a distance between the position of the terminal and a reference position of the candidate cell, and a reference signal reception quality of the candidate cell, wherein the first weight value is an influence degree of the remaining service time of the candidate cell on the first cell reselection index, the second weight value is an influence degree of the distance between the position of the terminal and the reference position of the candidate cell on the first cell reselection index, and the third weight value is an influence degree of the reference signal reception quality of the candidate cell on the first cell reselection index; The cell reselection priority of the candidate cell is determined according to the first cell reselection indicator, wherein the cell reselection priority is positively correlated with the first cell reselection indicator.

2. The method according to claim 1, characterized in that The method further comprises: The first weight value, the second weight value, and the third weight value are adjusted according to the service type of the terminal to meet service requirements.

3. The method according to claim 1, characterized in that The method further comprises: Obtain weight information of a target parameter of a target candidate cell, wherein the target parameter includes at least any one of a remaining service time of the target candidate cell, a distance between a position of the terminal and a reference position of the target candidate cell, and a reference signal reception quality of the target candidate cell; determine an entropy value of the target parameter according to the weight information; and determine a weight value of the target parameter of the target candidate cell according to the entropy value.

4. The method according to claim 1, characterized in that: Determining the cell reselection priority of each of the candidate cells according to at least one of the remaining service time of each of the candidate cells, the distance between the position of the terminal and the reference position of each of the candidate cells, and the reference signal reception quality of each of the candidate cells, comprises: According to the service type of the terminal, determine to select one or more indicators from three indicators: the remaining service time of the candidate cell, the distance between the terminal's position and the reference position of the candidate cell, and the reference signal reception quality of the candidate cell; according to the selected one or more indicators, determine the cell reselection probability of each candidate cell, wherein the cell reselection priority is determined according to the cell reselection probability and is positively correlated with the cell reselection probability.

5. The method according to claim 1, characterized in that A candidate cell is selected from multiple neighboring cells of the terminal, including: A candidate cell is selected from multiple neighboring cells according to the distance between the position of the terminal and the reference position of the neighboring cell, and / or according to the R value range information; wherein the neighboring cell whose distance between the position of the terminal and the reference position of the neighboring cell is less than or equal to the distance threshold of the cell reselection is taken as the candidate cell, and the neighboring cell whose R value is within the range of [Rbest-RTBC, Rbest] is taken as the candidate cell, wherein, Rbest represents the optimal R value, and RTBC represents the R value range information.

6. The method according to claim 1, characterized in that The method further comprises: Determine the remaining service time of the current serving cell according to the auxiliary information in the system information and the position of the terminal, wherein the auxiliary information includes satellite-related information and cell-related information; In the case where the distance threshold of the current serving cell is obtained, obtaining the distance between the position of the terminal and the reference position of the current serving cell, wherein the distance threshold of the current serving cell is determined according to the cell-related information, and the reference position of the current serving cell is determined according to the satellite-related information; In a case where the distance between the position of the terminal and the reference position of the current serving cell is greater than or equal to a distance threshold of the current serving cell, the mobile cell measurement is performed again.

7. The method according to claim 6, characterized in that Determining the remaining service time of the current serving cell according to the auxiliary information in the system information and the position of the terminal includes: Acquire a first surface arc distance between a first position point and a second position point, and a second surface arc distance between the second position point and a third position point, wherein the first position point is the position of the terminal, the second position point is the position point on the motion path of the terminal that is closest to the third position point, and the third position point is the reference position of the current serving cell; Determine a third surface arc distance according to the first surface arc distance and the second surface arc distance, wherein the third surface arc distance is the surface arc distance between the first position point and the third position point, wherein the first surface arc distance, the second surface arc distance and the third surface arc distance are all functions of time t; Determine the first time and the second time twice according to the third surface arc distance, wherein the third surface arc distance selected when determining the first time is the third surface arc distance determined in real time as time t changes, and the third surface arc distance selected when determining the second time is the radius of the current serving cell; The difference between the second time and the first time is determined as the remaining service time of the current service cell.

8. A mobile cell reselection method, characterized in that: include: Sending system information to a terminal, wherein the auxiliary information in the system information includes satellite-related information and cell-related information, so that the terminal determines the distance between the position of the terminal and the reference position of the neighboring cell according to the auxiliary information corresponding to the neighboring cell, so that the terminal determines the remaining service time of the candidate cell according to the auxiliary information and the position of the terminal, so that the terminal determines the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the position of the terminal and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, and determines the candidate cell with the highest cell reselection priority as the optimal cell for cell reselection; Wherein, so that the terminal determines the cell reselection priority of each candidate cell according to at least one of the remaining service time of each candidate cell, the distance between the position of the terminal and the reference position of each candidate cell, and the reference signal reception quality of each candidate cell, which is specifically implemented as follows: Determine a first cell reselection index according to a first weight value, a second weight value, a third weight value, a remaining service time of the candidate cell, a distance between the position of the terminal and a reference position of the candidate cell, and a reference signal reception quality of the candidate cell, wherein the first weight value is an influence degree of the remaining service time of the candidate cell on the first cell reselection index, the second weight value is an influence degree of the distance between the position of the terminal and the reference position of the candidate cell on the first cell reselection index, and the third weight value is an influence degree of the reference signal reception quality of the candidate cell on the first cell reselection index; The cell reselection priority of the candidate cell is determined according to the first cell reselection indicator, wherein the cell reselection priority is positively correlated with the first cell reselection indicator.

9. A terminal, characterized in that: include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include methods for executing any one of claims 1 to 7.

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