CN107211335B

CN107211335B - Cell reselection method and user terminal

Info

Publication number: CN107211335B
Application number: CN201580050055.6A
Authority: CN
Inventors: 耿婷婷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-10-12
Filing date: 2015-10-12
Publication date: 2020-02-14
Anticipated expiration: 2035-10-12
Also published as: CN107211335A; WO2017063125A1

Abstract

The embodiment of the invention discloses a cell reselection method and a user terminal, wherein the method comprises the following steps: the user terminal obtains a measurement list of reselection parameters including same frequency and/or different frequency from a network server, performs signal measurement on cells under the frequency points supported by the user terminal to obtain measurement parameters corresponding to each cell and having the same type as the reselection parameters, and selects cells with measurement parameters superior to the reselection parameters from the cells under the frequency points supported by the user terminal to form a target cell set, thereby selecting a first cell from the target cell set for residence. By implementing the embodiment of the invention, the user terminal can measure the signal of the cell under the supporting frequency point in the measurement list and select the cell from the target cell set meeting the residence condition for residence, thereby avoiding that more user terminals reside in the cell with higher priority at the same time, reducing the load of the cell with higher priority to a certain extent, improving the load balance degree among the cells and improving the utilization rate of network resources.

Description

Cell reselection method and user terminal

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a cell reselection method and a user terminal.

Background

Currently, in a Universal Mobile Telecommunications System (UMTS) and a Long Term Evolution (LTE) System, a non-proprietary UE (user equipment) usually performs a cell reselection process. In UMTS, the UE in the non-dedicated state includes UEs in an idle state, a Cell Paging state (Cell-PCH), a registration Area Paging state (URA-PCH) and a Cell forward Access Channel state (Cell-FACH), and in LTE, the UE in the non-dedicated state is the UE in the idle state.

In an actual cell reselection process, taking an LTE system as an example, a network server firstly broadcasts a priority list of each cell in a system message block, and when reselecting a cell, an idle UE performs signal measurement on the cell according to a sequence of priorities from high to low in the priority list, so as to camp on the cell meeting a camping condition. However, this may cause a large number of UEs in idle state to camp in the same cell with higher priority, and the number of UEs in idle state to camp in a cell with lower priority is small, so that load imbalance between cells occurs, thereby reducing network resource utilization.

Disclosure of Invention

The embodiment of the invention discloses a cell reselection method and a user terminal, which can improve the load balance degree among cells and improve the network resource utilization rate.

The first aspect of the embodiments of the present invention discloses a cell reselection method, including:

acquiring a measurement list from a network server, wherein the measurement list comprises reselection parameters of same frequency and/or different frequency, the same frequency is a frequency point where a current service cell of a user terminal is located, and the different frequency is a frequency point different from the frequency point where the current service cell of the user terminal is located;

performing signal measurement on cells under the frequency points supported by the user terminal in the measurement list to obtain measurement parameters corresponding to each cell and having the same type as the reselection parameters;

selecting cells with the measurement parameters superior to the reselection parameters from the cells under the supporting frequency points of the user terminal to form a target cell set;

and selecting a first cell from the target cell set for residing.

With reference to the first aspect of the present embodiment, in a first possible implementation manner of the first aspect of the present embodiment, the selecting the first cell from the target cell set for camping includes:

and randomly selecting the first cell from the target cell set and residing to the first cell.

With reference to the first aspect of the present embodiment, in a second possible implementation manner of the first aspect of the present embodiment, the selecting the first cell from the target cell set for camping includes:

selecting the first cell from the target cell set according to a preset sequence, and acquiring a reselection factor of the first cell;

generating a random number aiming at the first cell, and judging whether the random number is less than or equal to the reselection factor, wherein the value range of the random number is 0-1;

camping on the first cell when the random number is less than or equal to the reselection factor.

With reference to the second possible implementation manner of the first aspect of the embodiment of the present invention, in a third possible implementation manner of the first aspect of the embodiment of the present invention, the method further includes:

when the random number is larger than the reselection factor, acquiring the selection times of selecting the cells from the target cell set according to the preset sequence;

judging whether the selection times are smaller than preset selection control times or not;

when the selection times are smaller than the preset selection control times, selecting a second cell from the target cell set again according to a preset sequence, and acquiring a reselection factor of the second cell;

and when the selection times are equal to the preset selection control times, the mobile terminal camps in the first cell.

With reference to the second possible implementation manner of the first aspect of the embodiment of the present invention or the third possible implementation manner of the first aspect of the embodiment of the present invention, in a fourth possible implementation manner of the first aspect of the embodiment of the present invention, before the selecting the first cell from the target cell set according to the preset order and obtaining the reselection factor of the first cell, the method further includes:

configuring an average reselection factor for each cell in the target set of cells, wherein the average reselection factor is equal to the inverse of the number of cells in the target set of cells;

acquiring load information of each cell in the target cell set from the network server;

selecting a maximum load cell from the target cell set according to the load information, and reducing an average reselection factor of the maximum load cell to obtain a reselection factor of the maximum load cell;

and increasing the average reselection factors of the rest of the cells except the maximum load cell in the target cell set to obtain the reselection factors of the rest of the cells, wherein the sum of the reselection factor of the maximum load cell and the reselection factors of the rest of the cells is 1.

With reference to the second possible implementation manner of the first aspect of the embodiment of the present invention or the third possible implementation manner of the first aspect of the embodiment of the present invention, in a fifth possible implementation manner of the first aspect of the embodiment of the present invention, before the selecting the first cell from the target cell set according to the preset order and obtaining the reselection factor of the first cell, the method further includes:

identifying a target cell different from the cell where the user terminal is historically resident from the target cell set, and increasing an average reselection factor of the target cell to obtain a reselection factor of the target cell, wherein a frequency point of the target cell is different from a frequency point of the cell where the user terminal is historically resident;

and reducing the average reselection factors of the rest of the cells except the target cell in the target cell set to obtain the reselection factors of the rest of the cells, wherein the sum of the reselection factor of the target cell and the reselection factors of the rest of the cells is 1.

With reference to the second possible implementation manner of the first aspect of the embodiment of the present invention or the third possible implementation manner of the first aspect of the embodiment of the present invention, in a sixth possible implementation manner of the first aspect of the embodiment of the present invention, before the selecting the first cell from the target cell set according to the preset order and obtaining the reselection factor of the first cell, the method further includes:

selecting a highest priority cell from the target cell set, and increasing the average reselection factor of the highest priority cell to obtain the reselection factor of the highest priority cell;

and reducing the average reselection factors of the rest cells except the highest priority cell in the target cell set to obtain the reselection factors of the rest cells, wherein the sum of the reselection factor of the highest priority cell and the reselection factors of the rest cells is 1.

With reference to the second possible implementation manner of the first aspect of the embodiment of the present invention or the third possible implementation manner of the first aspect of the embodiment of the present invention, in a seventh possible implementation manner of the first aspect of the embodiment of the present invention, before the selecting the first cell from the target cell set according to the preset sequence and obtaining the reselection factor of the first cell, the method further includes:

and adjusting the average reselection factors of the rest of the cells except the maximum load cell, the target cell and the highest priority cell in the target cell set according to the reselection factor of the maximum load cell, the reselection factor of the target cell and the reselection factor of the highest priority cell to obtain the reselection factors of the rest of the cells, wherein the sum of the reselection factors of the maximum load cell, the target cell and the highest priority cell and the reselection factors of the rest of the cells is 1.

With reference to the second possible implementation manner of the first aspect of the embodiment of the present invention or the third possible implementation manner of the first aspect of the embodiment of the present invention, in an eighth possible implementation manner of the first aspect of the embodiment of the present invention, the obtaining the reselection factor of the first cell further includes:

and acquiring a reselection factor of the frequency point of the first cell from the measurement list.

A second aspect of the embodiments of the present invention discloses a user terminal, including:

an obtaining module, configured to obtain a measurement list from a network server, where the measurement list includes reselection parameters of a same frequency and/or a different frequency, the same frequency is a frequency point where a current serving cell of the user terminal is located, and the different frequency is a frequency point different from the frequency point where the current serving cell of the user terminal is located;

the measuring module is used for measuring signals of cells under the frequency points supported by the user terminal in the measuring list to obtain measuring parameters corresponding to each cell and having the same type as the reselection parameters;

a selecting module, configured to select a cell with a measurement parameter better than the reselection parameter from cells under the supported frequency point of the user terminal to form a target cell set;

and the residing module is used for selecting a first cell from the target cell set to reside.

With reference to the second aspect of the present embodiment, in a first possible implementation manner of the second aspect of the present embodiment, a specific manner in which the camping module selects the first cell from the target cell set to camp on is as follows:

With reference to the second aspect of the present embodiment, in a second possible implementation manner of the second aspect of the present embodiment, the residing module includes a selecting sub-module, an obtaining sub-module, a determining sub-module, and a residing sub-module, where:

the selecting submodule is used for selecting the first cell from the target cell set according to a preset sequence;

the obtaining submodule is used for obtaining a reselection factor of the first cell;

the judgment submodule is used for generating a random number aiming at the first cell and judging whether the random number is smaller than or equal to the reselection factor, wherein the value range of the random number is 0-1;

the resident sub-module is configured to reside in the first cell when the determining sub-module determines that the random number is less than or equal to the reselection factor.

With reference to the second possible implementation manner of the second aspect of the embodiment of the present invention, in a third possible implementation manner of the second aspect of the embodiment of the present invention,

the obtaining submodule is further configured to obtain, when the judging submodule judges that the random number is greater than the reselection factor, the selection times of the selecting submodule for selecting the cell from the target cell set according to the preset sequence;

the judgment submodule is further configured to judge whether the selection times are smaller than preset selection control times, and if yes, trigger the selection submodule to select a second cell from the target cell set again according to the preset sequence; if not, triggering the resident sub-module to reside in the first cell.

With reference to the second possible implementation manner of the second aspect of the present invention or the third possible implementation manner of the second aspect of the present embodiment, in a fourth possible implementation manner of the second aspect of the present embodiment, the user terminal further includes:

a configuration module, configured to configure an average reselection factor for each cell in the target cell set, wherein the average reselection factor is equal to a reciprocal of a number of cells in the target cell set;

the obtaining module is further configured to obtain load information of each cell in the target cell set from the network server;

the selecting module is further configured to select a maximum load cell from the target cell set according to the load information;

the user terminal further comprises:

an adjusting module, configured to reduce the average reselection factor of the maximum-load cell to obtain the reselection factor of the maximum-load cell, and increase the average reselection factors of the remaining cells in the target cell set except the maximum-load cell to obtain the reselection factors of the remaining cells, where a sum of the reselection factor of the maximum-load cell and the reselection factors of the remaining cells is 1.

With reference to the second possible implementation manner of the second aspect of the embodiment of the present invention or the third possible implementation manner of the second aspect of the embodiment of the present invention, in a fifth possible implementation manner of the second aspect of the embodiment of the present invention, the user terminal further includes:

the identification module is used for identifying a target cell different from the user terminal historical resident cell from the target cell set, wherein the frequency point of the target cell is different from the frequency point of the user terminal historical resident cell;

and an adjusting module, configured to increase the average reselection factor of the target cell to obtain a reselection factor of the target cell, and decrease the average reselection factors of the remaining cells in the target cell set except the target cell to obtain reselection factors of the remaining cells, where a sum of the reselection factor of the target cell and the reselection factors of the remaining cells is 1.

With reference to the second possible implementation manner of the second aspect of the embodiment of the present invention or the third possible implementation manner of the second aspect of the embodiment of the present invention, in a sixth possible implementation manner of the second aspect of the embodiment of the present invention, the user terminal further includes:

the selecting module is further configured to select a highest priority cell from the target cell set;

the user terminal further comprises:

an adjusting module, configured to increase the average reselection factor of the highest priority cell to obtain the reselection factor of the highest priority cell, and decrease the average reselection factors of the remaining cells in the target cell set except the highest priority cell to obtain the reselection factors of the remaining cells, where a sum of the reselection factor of the highest priority cell and the reselection factors of the remaining cells is 1.

With reference to the second possible implementation manner of the second aspect of the embodiment of the present invention or the third possible implementation manner of the second aspect of the embodiment of the present invention, in a seventh possible implementation manner of the second aspect of the embodiment of the present invention, the user terminal further includes:

the selecting module is further configured to select a maximum load cell from the target cell set according to the load information, and select a highest priority cell from the target cell set;

the user terminal further comprises:

an adjusting module, configured to reduce the average reselection factor of the maximum-load cell, obtain a reselection factor of the maximum-load cell, increase the average reselection factor of the target cell, obtain a reselection factor of the target cell, increase the average reselection factor of the highest-priority cell, and obtain a reselection factor of the highest-priority cell, and according to the reselection factor of the maximum load cell, the reselection factor of the target cell and the reselection factor of the highest priority cell, adjusting the average reselection factors of the rest cells except the maximum load cell, the target cell and the highest priority cell in the target cell set to obtain the reselection factors of the rest cells, wherein the sum of the reselection factor of the maximum loaded cell, the reselection factor of the target cell, the reselection factor of the highest priority cell, and the reselection factors of the other cells is 1.

With reference to the second possible implementation manner of the second aspect of the present embodiment or the third possible implementation manner of the second aspect of the present embodiment, in an eighth possible implementation manner of the second aspect of the present embodiment, the measurement list further includes reselection factors of the same frequency and/or different frequencies, and a specific manner for the obtaining sub-module to obtain the reselection factor of the first cell is as follows:

A third aspect of the embodiments of the present invention discloses a user terminal, including:

the receiver is used for receiving a measurement list from a network server, wherein the measurement list comprises reselection parameters of same frequency and/or different frequency, the same frequency is a frequency point where a current service cell of the user terminal is located, and the different frequency is a frequency point different from the frequency point where the current service cell of the user terminal is located;

the processor is used for measuring signals of cells under the frequency points supported by the user terminal in the measurement list to obtain measurement parameters corresponding to each cell and having the same type as the reselection parameters; selecting cells with the measurement parameters superior to the reselection parameters from the cells under the supporting frequency points of the user terminal to form a target cell set; and selecting a first cell from the target cell set for residing.

With reference to the third aspect of the embodiment of the present invention, in a first possible implementation manner of the third aspect of the embodiment of the present invention, a specific manner in which the processor selects the first cell from the target cell set to camp on is as follows:

With reference to the third aspect of the embodiment of the present invention, in a second possible implementation manner of the third aspect of the embodiment of the present invention, a specific manner in which the processor selects the first cell from the target cell set to camp on is as follows:

generating a random number for the first cell, and determining whether the random number is less than or equal to the reselection factor; wherein the value range of the random number is 0-1;

With reference to the second possible implementation manner of the third aspect of the embodiment of the present invention, in a third possible implementation manner of the third aspect of the embodiment of the present invention,

the processor is further configured to obtain the number of times of selecting the cell from the target cell set according to the preset sequence when the random number is greater than the reselection factor; judging whether the selection times are smaller than preset selection control times or not; when the selection times are smaller than the preset selection control times, selecting a second cell from the target cell set again according to a preset sequence, and acquiring a reselection factor of the second cell; and when the selection times are equal to the preset selection control times, the mobile terminal camps in the first cell.

With reference to the second possible implementation manner of the third aspect of the embodiment of the present invention or the third possible implementation manner of the third aspect of the embodiment of the present invention, in a fourth possible implementation manner of the third aspect of the embodiment of the present invention,

the processor is further configured to configure an average reselection factor for each cell in the target cell set before selecting the first cell from the target cell set according to the preset order and obtaining a reselection factor of the first cell, where the average reselection factor is equal to a reciprocal of a number of cells in the target cell set; acquiring load information of each cell in the target cell set from the network server; selecting a maximum load cell from the target cell set according to the load information, and reducing an average reselection factor of the maximum load cell to obtain a reselection factor of the maximum load cell; and increasing the average reselection factors of the rest of the cells except the maximum load cell in the target cell set to obtain the reselection factors of the rest of the cells, wherein the sum of the reselection factor of the maximum load cell and the reselection factors of the rest of the cells is 1.

With reference to the second possible implementation manner of the third aspect of the embodiment of the present invention or the third possible implementation manner of the third aspect of the embodiment of the present invention, in a fifth possible implementation manner of the third aspect of the embodiment of the present invention,

the processor is further configured to configure an average reselection factor for each cell in the target cell set before selecting the first cell from the target cell set according to the preset order and obtaining a reselection factor of the first cell, where the average reselection factor is equal to a reciprocal of a number of cells in the target cell set; identifying a target cell different from the cell where the user terminal is historically resident from the target cell set, and increasing an average reselection factor of the target cell to obtain a reselection factor of the target cell, wherein a frequency point of the target cell is different from a frequency point of the cell where the user terminal is historically resident; and reducing the average reselection factors of the rest of the cells except the target cell in the target cell set to obtain the reselection factors of the rest of the cells, wherein the sum of the reselection factor of the target cell and the reselection factors of the rest of the cells is 1.

With reference to the second possible implementation manner of the third aspect of the embodiment of the present invention or the third possible implementation manner of the third aspect of the embodiment of the present invention, in a sixth possible implementation manner of the third aspect of the embodiment of the present invention,

the processor is further configured to configure an average reselection factor for each cell in the target cell set before selecting the first cell from the target cell set according to the preset order and obtaining a reselection factor of the first cell, where the average reselection factor is equal to a reciprocal of a number of cells in the target cell set; selecting a highest priority cell from the target cell set, and increasing the average reselection factor of the highest priority cell to obtain the reselection factor of the highest priority cell; and reducing the average reselection factors of the rest cells except the highest priority cell in the target cell set to obtain the reselection factors of the rest cells, wherein the sum of the reselection factor of the highest priority cell and the reselection factors of the rest cells is 1.

With reference to the second possible implementation manner of the third aspect of the embodiment of the present invention or the third possible implementation manner of the third aspect of the embodiment of the present invention, in a seventh possible implementation manner of the third aspect of the embodiment of the present invention,

the processor is further configured to configure an average reselection factor for each cell in the target cell set before selecting the first cell from the target cell set according to the preset order and obtaining a reselection factor of the first cell, where the average reselection factor is equal to a reciprocal of a number of cells in the target cell set; acquiring load information of each cell in the target cell set from the network server; selecting a maximum load cell from the target cell set according to the load information, and reducing an average reselection factor of the maximum load cell to obtain a reselection factor of the maximum load cell; identifying a target cell different from the cell where the user terminal is historically resident from the target cell set, and increasing an average reselection factor of the target cell to obtain a reselection factor of the target cell, wherein a frequency point of the target cell is different from a frequency point of the cell where the user terminal is historically resident; selecting a highest priority cell from the target cell set, and increasing the average reselection factor of the highest priority cell to obtain the reselection factor of the highest priority cell; and adjusting the average reselection factors of the rest of the cells except the maximum load cell, the target cell and the highest priority cell in the target cell set according to the reselection factor of the maximum load cell, the reselection factor of the target cell and the reselection factor of the highest priority cell to obtain the reselection factors of the rest of the cells, wherein the sum of the reselection factors of the maximum load cell, the target cell and the highest priority cell and the reselection factors of the rest of the cells is 1.

With reference to the second possible implementation manner of the third aspect of the embodiment of the present invention or the third possible implementation manner of the third aspect of the embodiment of the present invention, in an eighth possible implementation manner of the third aspect of the embodiment of the present invention, the measurement list further includes reselection factors of the same frequency and/or different frequencies, and a specific manner for the processor to obtain the reselection factor of the first cell is as follows:

In the embodiment of the invention, after the user terminal acquires the measurement list of the reselection parameters including the same frequency and/or different frequencies from the network server, the user terminal performs signal measurement on the cells under the frequency points supported by the user terminal in the measurement list to obtain the measurement parameters corresponding to each cell and having the same type as the reselection parameters, and selects the cells with the measurement parameters superior to the reselection parameters from the cells under the frequency points supported by the user terminal to form a target cell set, thereby selecting the first cell from the target cell set for residing. By implementing the embodiment of the invention, the user terminal can measure the signal of the cell under the supporting frequency point in the measurement list to obtain the target cell set meeting the residence condition, and then selects the cell in the target cell set for residence.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention;

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

fig. 3 is a flowchart illustrating another cell reselection method according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a further cell reselection method according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating a further cell reselection method according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a further cell reselection method according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a user terminal according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another user terminal disclosed in the embodiment of the present invention;

fig. 9 is a schematic structural diagram of another user equipment disclosed in the embodiment of the present invention;

fig. 10 is a schematic structural diagram of another user equipment disclosed in the embodiment of the present invention;

fig. 11 is a schematic structural diagram of another user equipment disclosed in the embodiment of the present invention;

fig. 12 is a schematic structural diagram of another user equipment disclosed in the embodiment of the present invention;

fig. 13 is a schematic structural diagram of another user equipment according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention discloses a cell reselection method and a user terminal, which can improve the load balance degree among cells and improve the network resource utilization rate. The following are detailed below.

In order to better understand the cell reselection method and the user terminal disclosed in the embodiments of the present invention, a network architecture applicable to the embodiments of the present invention is described below. Referring to fig. 1, fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention. In the network architecture shown in fig. 1, a network server and a user terminal may be included. The network server may include, but is not limited to, a base station, a radio network controller, a base station controller, and the like, and the user terminal may include, but is not limited to, a Mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), and the like. By implementing the network architecture shown in fig. 1, when the user terminal performs cell reselection, information such as reselection parameters of each neighboring cell and/or frequency points where the neighboring cells are located, loads of the neighboring cells and/or frequency points where the neighboring cells are located, and priorities of the neighboring cells and/or frequency points where the neighboring cells are located may be obtained from the network server, so that the user terminal may quickly and reliably implement cell reselection.

Based on the network architecture shown in fig. 1, an embodiment of the present invention discloses a cell reselection method. Referring to fig. 2, fig. 2 is a flowchart illustrating a cell reselection method according to an embodiment of the present invention. As shown in fig. 2, the cell reselection method may include the following steps:

s201, the user terminal obtains a measurement list from a network server, wherein the measurement list comprises reselection parameters of same frequency and/or different frequency.

In the embodiment of the present invention, the network server may broadcast the measurement list to all the user terminals in the current cell, or may send the measurement list to each user terminal, respectively. Therefore, the manner in which the user terminal obtains the measurement list from the network server may be broadcast by the network server, or may be separately transmitted to the user terminal by the network server.

The same frequency is the frequency point of the current service cell of the user terminal, and the different frequency is the frequency point different from the frequency point of the current service cell of the user terminal. The reselection parameters of the same frequency and/or different frequencies can be understood as the reselection parameters of the frequency points, and the frequency points in the measurement list are the frequency points of the adjacent cells of the current service cell of the user terminal. When a frequency point corresponds to a cell, the reselection parameters of the same frequency and/or different frequencies can also be understood as the reselection parameters of the cell under each frequency point, that is, the reselection parameters of the neighboring cells of the current serving cell of the user terminal.

The reselection parameters may include, but are not limited to, a reference signal reception quality threshold, a reference signal reception power threshold, a signal to interference plus noise ratio threshold, a path loss threshold, a hysteresis time, and the like of each neighboring cell or a frequency point at which each neighboring cell is located.

It should be noted that the reselection parameters included in the measurement list broadcast by the network server or sent to the user terminal may be reselection parameters of the frequency point where the neighboring cell of the current serving cell of the user terminal is located, as shown in table 1; the reselection parameters of the neighboring cells of the current serving cell of the user terminal may also be shown in table 2; the reselection parameter may also be a reselection parameter of a network type to which a neighboring cell of the current serving cell of the user equipment belongs, such as a 2G, 3G, or 4G network system, as shown in table 3.

TABLE 1 measurement List of reselection parameters of frequency points where neighboring cells are located

Frequency point	Reselection parameters
		F1	A
F2	B

Table 2 measurement list of reselection parameters of neighboring cells

Frequency point	Cell	Reselection parameters
			F1	cell 1	A
F1	cell 2	A
			F2	cell 3	B
F2	cell 4	B

TABLE 3 measurement List of reselection parameters for network type of neighboring cell

Network system	Reselection parameters
		2G	K
3G	J
		4G	L

For convenience of description, the embodiments of the present invention mainly use the reselection parameters included in the measurement list and located at the frequency points of neighboring cells of the current serving cell of the user terminal to perform an explanation.

S202, the user terminal measures signals of the cells under the frequency points supported by the user terminal in the measurement list to obtain measurement parameters corresponding to each cell and having the same type as the reselection parameters.

In the embodiment of the invention, after the user terminal acquires the measurement list comprising the reselection parameters of the frequency points of the cells adjacent to the cell in which the user terminal is located, the signal measurement is carried out on each cell under the frequency points supported by the user terminal in the measurement list, so that the measurement parameters corresponding to each cell are obtained. The user terminal may perform signal measurement on each cell under each frequency point according to the sequence of the frequency points arranged in the measurement list, or may perform signal measurement on each cell under each frequency point according to the sequence of the priority of the frequency points, which is not limited in the embodiment of the present invention.

And the parameter type included by the measurement parameter corresponding to each cell is the same as the parameter type included by the reselection parameter of the frequency point to which the cell belongs. That is to say, when the reselection parameter of a certain frequency point includes the reference signal reception quality threshold, the reference signal reception power threshold, and the sir threshold of the frequency point, the user terminal performs signal measurement on the cell under the frequency point according to the signal reception quality, the signal reception power, and the sir, so as to obtain the signal reception quality, the signal reception power, and the sir corresponding to each cell under the frequency point.

For example, if the measurement list broadcast by the network server includes reselection parameters of frequency points belonging to cells adjacent to the cell where the user terminal is located, where the frequency points include F1, F2, F3, F4, and F5, and the frequency points supported by the user terminal are F2, F3, F5, and F6, after the user terminal acquires the measurement list, the user terminal performs signal measurement on the cells under the frequency points F2, F3, and F5, respectively. Assuming that reselection parameters of frequency points in a measurement list are a reference signal reception quality threshold and a signal to interference plus noise ratio, cells under a frequency point F2 have a cell2 and a cell3, a cell under a frequency point F3 has a cell4, and a cell under a frequency point F5 has a cell6 and a cell7, then a user terminal performs signal measurement on five cells, namely a cell2, a cell3, a cell4, a cell6 and a cell7, so as to obtain measurement parameters of the signal reception quality and the signal to interference plus noise ratio corresponding to each cell.

S203, the user terminal selects the cells with the measurement parameters superior to the reselection parameters from the cells under the frequency points supported by the user terminal to form a target cell set.

In the embodiment of the invention, after a user terminal performs signal measurement on a certain cell under a supporting frequency point in a measurement list to obtain a measurement parameter corresponding to the cell, the measurement parameter is compared with a reselection parameter of the frequency point of the cell, and if the measurement parameter is superior to the reselection parameter, the cell is taken as a cell in a target cell set.

When the reselection parameter of the frequency point to which a certain cell belongs includes a reference signal received quality threshold, a reference signal received power threshold and a signal to interference plus noise ratio threshold, the measurement parameter obtained after the user terminal performs signal measurement on the cell also includes the signal received quality, the signal received power and the signal to interference plus noise ratio of the cell, and therefore, the measurement parameter is better than the reselection parameter by: each of the measured parameters is greater than the reselection parameter; when the reselection parameter of the frequency point to which a certain cell belongs includes a path loss threshold, the measurement parameter obtained after the user terminal performs signal measurement on the cell also includes the path loss of the cell, and therefore, the measurement parameter is better than the reselection parameter can be understood as: the path loss is less than the path loss threshold.

S204, the user terminal selects a first cell from the target cell set for residing.

In the embodiment of the invention, the user terminal selects the first cell from the target cell set for residing after the user terminal performs signal measurement on the cells under the supporting frequency points in the measurement list and selects the target cell set.

Specifically, the specific way for the user terminal to select the first cell from the target cell set for camping may be:

and randomly selecting a first cell from the target cell set for residing. That is to say, the probability that each cell in the target cell set is selected by the user terminal is the same, so that most of the user terminals can be prevented from residing in the cell with larger load at the same time, the load pressure of the cell with larger load is reduced, and the load balance among the cells is realized.

It can be seen that, in the method described in fig. 2, when the user terminal performs cell reselection, the cell under the supporting frequency point may be measured by using the reselection parameter in the measurement list, so as to select the cell meeting the residence condition, and then select the first cell among the cells for residence, so that the load pressure of the cell with a larger load may be dispersed to a certain extent, thereby improving the load balance among the cells and improving the utilization rate of network resources.

Based on the network architecture shown in fig. 1, another cell reselection method is disclosed in the embodiment of the present invention. Referring to fig. 3, fig. 3 is a flowchart illustrating another cell reselection method according to an embodiment of the present invention. As shown in fig. 3, the cell reselection method may include the following steps:

s301, the user terminal obtains a measurement list from the network server, wherein the measurement list comprises reselection parameters of same frequency and/or different frequency.

S302, the user terminal measures the signal of the cell under the frequency point supported by the user terminal in the measurement list to obtain the measurement parameter corresponding to each cell and having the same type with the reselection parameter.

S303, the user terminal selects the cells with the measurement parameters superior to the reselection parameters from the cells under the supporting frequency point of the user terminal to form a target cell set.

S304, the user terminal selects a first cell from the target cell set according to a preset sequence, and obtains a reselection factor of the first cell.

In the embodiment of the present invention, after the user terminal selects the target cell set satisfying the camping condition from the measurement list, a reselection factor may be configured for each cell in the target cell set, where the reselection factor is a probability that each cell successfully camps after being selected by the user terminal. And the sum of the reselection factors of all the cells in the target cell set is 1.

Therefore, after selecting the target cell set from the cells under the supported frequency points in the measurement list, the user terminal selects the first cell from the target cell set according to the preset sequence, and simultaneously locally obtains the reselection factor of the first cell. The preset sequence may be a sequence of the frequency point where the cell is located in the measurement list, or a high-low sequence of the priority of the frequency point where the cell is located.

For example, assuming that cells in a target cell set selected by a user terminal from a measurement list include cell4, cell5, and cell6, and reselection factors configured by the user terminal for the three cells are 0.5, 0.3, and 0.2, respectively, when the user terminal selects cell6 according to the sequence of frequency points of the cells in the measurement list, the reselection factor of cell6 may be obtained locally, which is 0.2.

As a possible implementation, the reselection factor of the cell may also be configured by the network server. When the network server broadcasts or sends a measurement list, the measurement list comprises the reselection factor of each frequency point, wherein the sum of the reselection factors of all the frequency points in the measurement list is 1. It should be noted that the reselection factor of the cell under each frequency point is the reselection factor of the frequency point. Therefore, after the user terminal selects the first cell from the target cell set according to the preset sequence, the reselection factor of the frequency point where the first cell is located may be obtained from the measurement list.

For another example, the reselection parameter measurement list of each frequency point broadcasted by the network server is as shown in table 1, and the reselection factor configured for each frequency point, that is, the reselection factor of frequency point F1 is 0.6, and the reselection factor of frequency point F2 is 0.4. When the user terminal performs signal measurement on cell1, cell2, cell3 and cell4 under the supported frequency points F1 and F2 in the measurement list, the measurement parameters of cell2 and cell3 are respectively better than the reselection parameters of F1 and F2, so that the user terminal selects a cell2 from the cell2 and the cell3, and then the reselection factor of the cell2 can be obtained from the measurement list to be 0.6.

As another possible implementation manner, after selecting cells with better measurement parameters than reselection parameters from the cells under the supported frequency of the user terminal to form a target cell set, and before selecting a first cell from the target cell set and obtaining a reselection factor of the first cell, the user terminal may further configure a reselection factor for each cell in the target cell set. The mode of configuring the reselection factors for each frequency point in the measurement list by the network server is the same as the mode of configuring the reselection factors for each cell in the target cell set by the user terminal. In the following, taking the user equipment as an example to configure the reselection factor for each cell in the target cell set, the specific implementation manner may be:

in the first mode, on the premise of considering cell loads, a specific mode in which a user terminal configures a reselection factor for each cell in a target cell set may include the following steps:

step 11) the user terminal configures an average reselection factor for each cell in the target cell set;

step 12) the user terminal obtains the load information of each cell in the target cell set from the network server;

step 13) the user terminal selects the largest load cell from the target cell set according to the load information, and reduces the average reselection factor of the largest load cell to obtain the reselection factor of the largest load cell;

and step 14) the user terminal increases the average reselection factors of the rest cells except the maximum load cell in the target cell set to obtain the reselection factors of the rest cells.

In a specific implementation, after the user terminal selects the target cell set, an average reselection factor may be configured for each cell according to the number of cells in the target cell set. Wherein the average reselection factor is equal to the inverse of the number of cells in the target set of cells. That is, the reselection factor for each cell in the target set of cells is the same, and the sum of the average reselection factors for all cells is 1.

Further, the network server may obtain load information of each cell in real time, and the user terminal may obtain the load information of each cell in the target cell set from the network server. The user terminal may obtain the load of each cell from the load information of each cell, so as to obtain the maximum load cell. Since the reselection factors of the cells are all average reselection factors initially, after the user terminal acquires the maximum-load cell, in order to avoid an excessive load of the maximum-load cell, the average reselection factor of the maximum-load cell may be reduced, so as to obtain the reselection factor of the maximum-load cell. Wherein the reselection factor of the maximum load cell is smaller than the reselection factor of any cell in the rest cells. By the method, after the user terminal selects the first cell from the target cell set according to the preset sequence, the probability that the maximum load cell is successfully resided by the user terminal is reduced, so that the load pressure of the maximum load cell can be effectively reduced, and the load balance among the cells is realized.

The user terminal may obtain the load information of each cell in the target cell set from the network server in a manner that the network server broadcasts the load information of each cell to each user terminal at intervals; if the reselection parameter is a reselection parameter of a cell in the measurement list broadcasted or sent by the network server, the network server may also carry load information of each cell in the broadcasted or sent measurement list, which is not limited in the embodiment of the present invention.

It should be noted that, the specific reduction amount of the average reselection factor of the maximum-load cell may be determined by combining the load degree of the cell and the load difference between the cells in the target cell set, and the embodiment of the present invention is not limited thereto. For example, if the load of a cell in the target cell set is much greater than the load of the rest of the cells, the reduction in the average reselection factor for that cell may be large, even reducing the average reselection factor for that cell to 0. The maximum load cell may include one or more cells with the maximum load in the target cell set, or one or more cells with a load greater than a preset load in the target cell set, which is not limited in the embodiment of the present invention.

Further, while reducing the average reselection factor of the maximum load cell, the user terminal may also adjust the average reselection factors of the remaining cells in the target cell set according to the reduced reselection factor of the maximum load cell, so as to obtain the reselection factors of the remaining cells. That is, after reducing the average reselection factor of the most loaded cell, the ue needs to increase the average reselection factors of the remaining cells appropriately, so that the sum of the reselection factors of all the cells in the target cell set is always 1.

Optionally, after reducing the average reselection factor of the maximum-load cell, the user terminal may increase the average reselection factors of the remaining cells to the same reselection factor, or may adjust the reselection factors of each of the remaining cells to different degrees, but the reselection factor of the maximum-load cell is the smallest in all the cells in the target cell set.

For example, assuming that the target cell set includes 5 cells and the average reselection factor of each cell is 0.2, when the ue selects the maximum-loaded cell from the 5 cells, the average reselection factor of the maximum-loaded cell is reduced to 0.1, and then the ue may increase the average reselection factors of the remaining 4 cells to 0.225, or adjust the average reselection factors of the remaining 4 cells to 0.2, 0.25, and 0.25, respectively.

In a second mode, on the premise of considering the relationship between the cell frequency point and the user terminal history resident cell frequency point, the specific mode that the user terminal configures the reselection factor for each cell in the target cell set may further include the following steps:

step 21) the user terminal configures an average reselection factor for each cell in the target cell set;

step 22) the user terminal identifies a target cell different from the cell where the user terminal is resided historically from the target cell set, and increases the average reselection factor of the target cell to obtain the reselection factor of the target cell;

and step 23) the user terminal reduces the average reselection factors of the rest cells except the target cell in the target cell set to obtain the reselection factors of the rest cells.

In specific implementation, when the user terminal performs cell residence, the frequency point of the cell where the user terminal historically resides can be recorded. Therefore, after the user terminal selects the target cell set, the target cell different from the historical resident cell can be identified from the target cell set according to the frequency point of the historical resident cell recorded by the user terminal, that is, the frequency point of the target cell is different from the frequency point of the historical resident cell of the user terminal. Then, on the basis that the reselection factors of each cell in the target cell set are average reselection factors, the user terminal may increase the average reselection factor of the target cell to obtain the reselection factor of the target cell, and decrease the average reselection factors of the remaining cells to obtain the reselection factors of the remaining cells. The reselection factor of the target cell is greater than the reselection factor of any one of the rest cells, and the sum of the reselection factor of the target cell and the reselection factors of the rest cells needs to be 1.

It should be noted that, the frequency point of the target cell is different from the frequency point of the cell where the user terminal resides in history, and can be understood as follows: the frequency point of the target cell is the frequency point which is not resided before in the frequency points supported by the user terminal.

Optionally, the user terminal may further identify a newly added frequency point of the network, and if a cell under the newly added frequency point exists in the target cell set, the user terminal may also increase a reselection factor of the cell, so that when the user terminal selects the cell, a success rate of residing in the cell is high, thereby realizing load balancing among the cells to a certain extent.

By the method, after the user terminal selects the first cell from the target cell set according to the preset sequence, when the target cell different from the cell where the user terminal historically resides is selected, the probability that the target cell is successfully resided by the user terminal is increased, and for each user terminal, the cells different from the cell where the user terminal historically resides are also different, so that the load balance among the cells can be effectively improved.

For example, the frequency points recorded by the user terminal and historically camping on the cell have F3 and F4, the frequency points supported by the user terminal include F2, F3, F4, and F5, and the measurement list broadcast by the network server includes reselection parameters of the frequency points F1, F2, F3, F4, F6, and F7. Therefore, the user terminal performs signal measurement on cells under F2, F3, and F4 in the measurement list, and it is assumed that a cell under F2 frequency has cell2 and cell3, a cell under F3 frequency has cell4, and a cell under F4 frequency has cell 5. The ue performs signal measurement on cells 2, 3, 4, and 5 to obtain measurement parameters corresponding to each cell. Assuming that the measurement parameters of the cells of cell2, cell3, and cell4 are better than the reselection parameters of the corresponding frequency points, the cells included in the target cell set are cell2, cell3, and cell 4. Therefore, the ue initially configures an average reselection factor 1/3 for the cells 2, 3, and 4. When the user terminal identifies that the frequency points of the cell2 and the cell3 are different from the frequency points of the cells where the cells are camped historically, the user terminal increases the average reselection factors of both the cell2 and the cell3 to 0.4, and thus, the average reselection factor of the cell4 is reduced to 0.2. Of course, the ue may also increase the average reselection factor of the cell2 cell to 0.5 and the average reselection factor of the cell3 cell to 0.4, so that the average reselection factor of the cell4 cell is reduced to 0.1.

In a third embodiment, on the premise of considering the cell priorities, the specific method for configuring the reselection factor for each cell in the target cell set by the user terminal may further include the following steps:

step 31) the user terminal configures an average reselection factor for each cell in the target cell set;

step 32) the user terminal selects the highest priority cell from the target cell set, and increases the average reselection factor of the highest priority cell to obtain the reselection factor of the highest priority cell;

and step 33) the user terminal reduces the average reselection factors of the rest cells except the cell with the highest priority in the target cell set to obtain the reselection factors of the rest cells.

In specific implementation, when broadcasting or sending the measurement list, the network server may broadcast or send the priority of each frequency point at the same time. Therefore, after the user terminal selects the target cell set from the cells under the supported frequency points, the user terminal can select the highest priority cell from the target cell set according to the priority. Then, on the basis that the reselection factors of each cell in the target cell set are average reselection factors, the user terminal may appropriately increase the average reselection factor of the highest priority cell to obtain the reselection factor of the highest priority cell, and decrease the average reselection factors of the remaining cells to obtain the reselection factors of the remaining cells. The reselection factor of the highest priority cell is greater than the reselection factors of any one of the rest cells, and the sum of the reselection factor of the highest priority cell and the reselection factors of the rest cells is required to be 1.

In this way, after the user terminal selects the first cell from the target cell set according to the preset sequence, when the highest priority cell is selected, the probability that the highest priority cell is successfully resided by the user terminal is greater than that of the rest of the cells, so that the maximum priority principle can be followed on the premise of ensuring the relative balance of the residence probability among the cells, and the load balance among the cells can be realized to a certain extent.

It should be noted that, after configuring the average reselection factor for each cell in the target cell set, the user terminal may adjust the average reselection factor for each cell in the target cell set by considering any one or more of the cell load, the relationship between the cell frequency point and the user terminal historical resident cell frequency point, and the cell priority.

When the average reselection factor of each cell in the target cell set is adjusted according to multiple factors, the cell load may be prioritized, that is, when the priority of the cell with the highest load is also the highest, the average reselection factor of the cell may be reduced.

In a fourth mode, on the premise of simultaneously considering three factors, namely the cell load, the relationship between the cell frequency point and the user terminal historical resident cell frequency point, and the cell priority, the specific mode that the user terminal configures the reselection factor for each cell in the target cell set may further include the following steps:

step 41) the user terminal configures an average reselection factor for each cell in the target cell set;

step 42) the user terminal obtains the load information of each cell in the target cell set from the network server;

step 43) the user terminal selects the largest load cell from the target cell set according to the load information, and reduces the average reselection factor of the largest load cell to obtain the reselection factor of the largest load cell;

step 44) the user terminal identifies different target cells from the target cell set, wherein the different target cells are resided in the cells of the user terminal history, and increases the average reselection factor of the target cells to obtain the reselection factor of the target cells;

step 45), the user terminal selects the highest priority cell from the target cell set, and increases the average reselection factor of the highest priority cell to obtain the reselection factor of the highest priority cell;

and step 46) the user terminal adjusts the average reselection factors of the rest cells except the maximum load cell, the target cell and the highest priority cell in the target cell set according to the reselection factor of the maximum load cell, the reselection factor of the target cell and the reselection factor of the highest priority cell to obtain the reselection factors of the rest cells.

In a specific implementation, after configuring an average reselection factor for each cell in a target cell set, a user terminal may decrease the average reselection factor of a maximum-load cell, increase the average reselection factor of a target cell different from a cell where the user terminal has historically resided, and increase the average reselection factor of a highest-priority cell, and then adjust the average reselection factors of the remaining cells to obtain reselection factors of the remaining cells. In the target cell set after the average reselection factor is adjusted, the reselection factor of the largest load cell is the smallest, and the reselection factors of the highest priority cell and the target cell are relatively larger than those of the rest cells. After the user terminal selects the first cell from the target cell set according to the preset sequence, the probability that the largest load cell is successfully resided by the user terminal is low, and the probability that the target cell and the highest priority cell are successfully resided by the user terminal is high, so that the load can be uniformly dispersed to each cell, the load balance among the cells is improved, and the utilization rate of network resources is improved.

It should be noted that the sum of the adjusted reselection factor of the maximum load cell, the reselection factor of the target cell, the reselection factor of the highest priority cell, and the reselection factors of the remaining cells is still 1.

When the priority of the maximum load cell is the highest, or when the maximum load cell is different from the user terminal historical resident cell, the average reselection factor of the maximum load cell is mainly reduced, and the highest priority cell and the target cell can be selected from other cells except the maximum load cell in the target cell set.

For example, assuming that the cells included in the target cell set are cell2, cell3, cell4, cell5, and cell6, respectively, the user terminal may first configure the reselection factor of each cell in the target cell set as an average reselection factor, that is, the reselection factor of each cell is 0.2. When the user terminal arranges the cells in the target cell set in the order of load from large to small, namely cell6 > cell3 > cell4 > cell2 > cell5, and arranges the cells in the order of priority from high to low, namely cell6 > cell2 > cell3 > cell5 > cell4, and identifies that the cell different from the cell where the user terminal is historically resident is cell3, the user terminal may obtain the cell with the largest load as cell6, and the cell with the highest priority is selected from the cells except for cell6, namely cell 2. Therefore, the ue may decrease the average reselection factor of the cell6 cell to 0.08, increase the average reselection factor of the cell2 cell to 0.3, and increase the average reselection factor of the cell3 cell to 0.28, so that the reselection factors of the cell4 cell and the cell5 cell may be decreased to 0.17 at the same time.

S305, the ue generates a random number for the first cell, and determines whether the random number is smaller than or equal to the reselection factor, if so, executes step S306.

In the embodiment of the present invention, after obtaining the reselection factor of the cell, the user terminal may randomly generate a number (i.e., a random number) within a number range of 0 to 1, so that the user terminal may select the first cell from the target cell set according to a preset sequence and may not directly camp on the first cell. That is, after the user terminal selects a certain cell, the success rate of camping to the cell is consistent with the reselection factor of the cell, thereby realizing load balance among the cells.

Specifically, when a random number is generated for the first cell, the ue may determine whether the random number is smaller than or equal to a reselection factor of the first cell, and if the random number is smaller than or equal to the reselection factor, the ue camps on the first cell; if the reselection factor is larger than the threshold value, the user terminal selects a second cell from the target cell set again according to the preset sequence, acquires the reselection factor of the second cell, generates a random number for the second cell again, and compares the random number with the reselection factor of the second cell until the user terminal successfully resides in a certain cell in the target cell set.

S306, the ue camps on the first cell, and ends the process.

In the embodiment of the present invention, when it is determined that the random number generated by the ue is smaller than or equal to the reselection factor of the first cell, the ue may camp on the first cell.

It can be seen that, in the method described in fig. 3, when the user terminal performs cell reselection, a reselection factor may be configured for each cell, when the user terminal selects a cell from a target cell set that meets the residence condition according to a preset sequence, the success rate of residence of each cell by the user terminal is the same as the reselection factor configured for each cell, and thus the load among each cell is balanced to a certain extent, and the network resource utilization rate is improved.

Based on the network architecture shown in fig. 1, an embodiment of the present invention discloses yet another cell reselection method. Referring to fig. 4, fig. 4 is a flowchart illustrating another cell reselection method according to an embodiment of the present invention. As shown in fig. 4, the cell reselection method may include the following steps:

s401, the user terminal obtains a measurement list from a network server, wherein the measurement list comprises reselection parameters of same frequency and/or different frequency.

S402, the user terminal measures the signal of the cell under the frequency point supported by the user terminal in the measurement list to obtain the measurement parameter corresponding to each cell and having the same type with the reselection parameter.

S403, the user terminal selects cells with measurement parameters superior to reselection parameters from the cells under the frequency supported by the user terminal to form a target cell set.

S404, the user terminal selects a first cell from the target cell set according to a preset sequence, and obtains a reselection factor of the first cell.

S405, the user terminal generates a random number aiming at the first cell, and judges whether the random number is less than or equal to the reselection factor, if so, the step S407 is executed; if not, go to step S406.

In the embodiment of the invention, when the random number generated by the user terminal is less than or equal to the reselection factor of the first cell, the user terminal directly resides in the first cell; and when the random number generated by the user terminal is greater than the reselection factor of the cell, the user terminal further obtains the selection times of selecting the cell from the target cell set according to a preset sequence.

S406, the user terminal obtains the selection times of selecting the cells from the target cell set according to the preset sequence, judges whether the selection times is less than the preset selection control times, and if so, executes the step S404; if not, go to step S407.

In the embodiment of the present invention, in order to prevent the user terminal from being unable to successfully camp on the cells in the target cell set for a long time, a preset selection control number may be introduced, that is, the user terminal selects the maximum operation number of the cells from the target cell set according to a preset sequence. Therefore, when the user terminal selects the cells from the target cell set according to the preset sequence, the selection times of the selected cells are recorded. The preset selection control times may be set by the user terminal according to an empirical value, or may be set by the network server according to the number of cells in the measurement list that may satisfy the user terminal residence condition, which is not limited in the embodiment of the present invention. The empirical value may be a critical value obtained by the user terminal through the moving speeds corresponding to the previous cell reselection occurrence time and the previous cell reselection non-occurrence time.

Therefore, when the random number generated by the ue is greater than the reselection factor of the cell, the ue may obtain the selection times for selecting the cell and determine whether the selection times is less than the preset selection control times.

Further, when the selection times are less than the preset selection control times, the user terminal selects a second cell from the target cell set again according to the preset sequence; and when the selection times are equal to the preset selection control times, the user terminal directly resides in the first cell.

For example, if the number of the cells in the target cell set is 6 and the predetermined selection control number is set to 5, when the ue selects a cell from the target cell set in the order of the measurement list, if the 5 th cell is selected, the ue directly camps on the cell even if the random number generated by the ue is greater than the reselection factor of the cell.

S407, the ue camps on the first cell.

In the embodiment of the present invention, when the random number generated by the ue is smaller than or equal to the reselection factor of the first cell, or when the random number generated by the ue is larger than the reselection factor of the first cell and the number of times of selecting cells from the target cell set according to the preset sequence is equal to the preset selection control number, the ue may directly camp on the first cell.

It can be seen that, in the method described in fig. 4, when the user terminal performs cell reselection, the user terminal may directly camp on the selected cell when the number of times of selecting the selected cell is equal to the preset number of times of selecting control, so as to prevent the user terminal from being unable to camp on the cell for a long time, and thus the user terminal can camp on the cell meeting the camping condition faster.

Based on the network architecture shown in fig. 1, an embodiment of the present invention discloses yet another cell reselection method. Referring to fig. 5, fig. 5 is a flowchart illustrating another cell reselection method according to an embodiment of the present invention. As shown in fig. 5, the cell reselection method may include the following steps:

s501, the user terminal detects the moving speed of the user terminal and judges whether the moving speed is less than or equal to a preset moving speed threshold value, if so, the step S502 is executed; if not, the flow is ended.

In the embodiment of the present invention, if the user terminal acquires the measurement list broadcasted or sent by the network server, the user terminal must perform cell reselection according to the reselection parameters in the measurement list. If the user terminal acquires the measurement list broadcasted or sent by the network server in the process of continuously moving, even if all parameters of the cell where the user terminal currently resides meet the residence conditions, the user terminal can also continuously reselect the cell, so that the user terminal can be continuously switched back and forth between cells of all frequency points, and the power consumption of the user terminal is increased.

Therefore, before acquiring the measurement list from the network server, if the user terminal detects that the user terminal is in a moving state, the user terminal acquires the moving speed of the user terminal and judges whether the moving speed is smaller than or equal to a preset moving speed threshold value. The user terminal can be positioned by the positioning device so as to detect the moving speed of the user terminal.

Further, if the moving speed of the user terminal is less than or equal to the preset moving speed threshold, the user terminal can acquire the measurement list from the network server to realize more uniform residence to each cell; if the moving speed of the user terminal is greater than the preset moving speed threshold, in order to avoid cell reselection of the user terminal too frequently, or cell reselection ping-pong caused by back-and-forth residence in cells with different frequency points, the user terminal may ignore a measurement list broadcasted or transmitted by the network server, and cell reselection may be performed only when a signal measurement parameter of the currently resident cell is less than a certain threshold, or a cell with the same frequency point as the currently resident cell is selected for residence when cell reselection is performed, so that power consumption caused by frequent cell reselection of the user terminal when the moving speed is high may be reduced.

The preset speed threshold may be configured for each user terminal by the network server, or may be set by each user terminal according to the previously recorded moving speed of the user terminal when the user terminal reselects ping-pong.

S502, the user terminal obtains a measurement list from the network server, wherein the measurement list comprises reselection parameters of the frequency points supported by the user terminal.

S503, the user terminal measures signals of each cell under the frequency point to obtain measurement parameters corresponding to each cell and having the same reselection parameter type.

S504, the user terminal selects the cells with the measurement parameters superior to the reselection parameters from all the cells under the frequency point to form a target cell set.

S505, the ue randomly selects a first cell from the target cell set to camp on, and ends the process.

It can be seen that, in the method described in fig. 5, when the moving speed of the user terminal is low, the user terminal may randomly camp to the cell satisfying the camping condition, or camp to the cell according to the reselection factor of each cell, and when the moving speed of the user terminal is high, to avoid cell reselection ping-pong, the user terminal may perform cell reselection only when the signal measurement parameter of the currently camped cell is less than a certain threshold, or select the cell having the same frequency point as the currently camped cell when performing cell reselection, so that cell reselection ping-pong caused by the high moving speed of the user terminal may be avoided, and the power consumption of the user terminal may be reduced.

Based on the network architecture shown in fig. 1, an embodiment of the present invention discloses yet another cell reselection method. Referring to fig. 6, fig. 6 is a flowchart illustrating another cell reselection method according to an embodiment of the present invention. As shown in fig. 6, the cell reselection method may include the following steps:

s601, the user terminal obtains a measurement list from the network server, wherein the measurement list comprises reselection parameters of same frequency and/or different frequency.

S602, the user terminal selects a first cell from the cells under the frequency points supported by the user terminal in the measurement list according to a preset sequence, and the first cell is used as the current measurement cell.

In this embodiment of the present invention, the preset sequence may be a sequence of the supported frequency point (or the cell under the supported frequency point) of the user terminal in the measurement list, or may also be a sequence of priorities of the supported frequency points (or the cells under the supported frequency point) of the user terminal from high to low, which is not limited in this embodiment of the present invention.

Therefore, if the network server broadcasts or transmits the priority of each frequency point or cell to the user terminal, the user terminal will select the cell with the highest priority from the cells under the supported frequency points according to the sequence from high priority to low priority, so as to use the cell as the measurement cell for the user terminal to measure the signal currently.

S603, the user terminal measures the signal of the measuring cell to obtain the measuring parameter corresponding to the measuring cell and having the same type with the reselection parameter.

S604, when the measurement parameter is better than the reselection parameter, the user terminal obtains the reselection factor of the measured cell from the network server.

In the embodiment of the present invention, the network server configures reselection factors for each neighboring cell according to information such as a coverage area, a cell priority, a cell load, and the like of a cell neighboring to a cell in which the user terminal is located, where a sum of reselection factors of all neighboring cells is 1. Or configuring reselection factors for the frequency points to which each neighboring cell belongs, wherein the sum of the reselection factors of all the frequency points is 1, and then the reselection factor of the cell can be regarded as the reselection factor of the frequency point to which the cell belongs. When broadcasting or transmitting the measurement list, the network server can broadcast or transmit the frequency point to which each neighboring cell belongs or the reselection factor of each neighboring cell to the user terminal,

therefore, after the user terminal performs signal measurement on the measurement cell to obtain the measurement parameter of the measurement cell, it is further determined whether the measurement parameter is better than the reselection parameter of the measurement cell or the frequency point to which the measurement cell belongs, and if so, the user terminal obtains the reselection factor of the measurement cell from the network server.

For example, if the network server broadcasts or sends a measurement list to the ue of the current cell, where the measurement list includes cell reselection parameters of all neighboring cells cell1, cell2, cell3, cell4, cell5, cell6, cell7, and cell 8 of the current cell, the network server configures reselection factors for each neighboring cell at the same time, and it is assumed that the reselection factors of each neighboring cell are 0.3, 0.1, 0.07, 0.06, 0.08, 0.05, 0.2, and 0.14, respectively. When the user terminal selects the cell3 from the cells under the frequency point supported by the user terminal according to the sequence of the cells in the measurement list, the user terminal can further acquire that the reselection factor of the cell3 is 0.07 from the measurement list.

S605, the user terminal generates a random number aiming at the measuring cell, and judges whether the random number is less than or equal to the reselection factor, if so, the step S606 is executed; if not, go to step S602.

In the embodiment of the invention, the value range of the random number is 0-1, so that the success rate of residing to the measuring cell is consistent with the reselection factor of the cell after the user terminal selects the measuring cell according to the preset sequence, and the number of the user terminals residing in each cell is distributed according to the reselection factor configured by the network server, thereby realizing load balance among the cells.

Therefore, when the random number is smaller than or equal to the reselection factor of the measurement cell, the ue directly camps on the measurement cell; and when the random number is greater than the reselection factor of the measurement cell, the user terminal selects a next cell of the first cell from the cells under the frequency points supported by the user terminal according to a preset sequence as the current measurement cell.

For example, if the network server broadcasts or sends a measurement list to the ue of the current cell, where the measurement list includes cell reselection parameters of all neighboring cells cell1, cell2, cell3, cell4, cell5, cell6, cell7, and cell 8 of the current cell, the network server configures reselection factors for each neighboring cell according to a load condition of each neighboring cell, a cell priority, or a size of a coverage area, and a sum of the reselection factors of all neighboring cells is 1. Assuming that the reselection factors of each adjacent cell are 0.3, 0.1, 0.07, 0.06, 0.08, 0.05, 0.2, and 0.14, and the cells corresponding to the supported frequency points are cell1, cell2, cell3, cell4, and cell5, when the user terminal selects cell1 as the measurement cell according to the sequence of the 5 cells in the measurement list, the user terminal may acquire the reselection factor of cell1 as 0.3, when the random number generated by the user terminal is 0.2, the user terminal may camp on cell1, and when the random number generated by the user terminal is 0.5, the user terminal may select cell2 as the measurement cell according to the sequence of the 5 cells in the measurement list. That is, when the ue determines whether to camp on the measurement cell1 by generating the random number, the probability that the cell1 is successfully camped on by the ue is 0.3.

S606, the ue camps on the measurement cell.

In the embodiment of the present invention, when it is determined that the random number generated by the ue is smaller than or equal to the reselection factor of the cell, the ue may camp on the cell.

It can be seen that, in the method described in fig. 6, the network server may configure reselection factors for all cells in combination with the load conditions, priorities or coverage areas, signal stability, access success rates, call drop rates, and other factors of all neighboring cells of the current cell, and after the user terminal selects a cell under the supporting frequency point of the user terminal in the measurement list, the user terminal resides in the cell with the same success rate as the configured reselection factor, so that the load pressure of the cells with higher priorities or larger loads is reduced to a certain extent, the load balance among the cells is realized, and the network resource utilization rate is improved.

Based on the network architecture shown in fig. 1, the embodiment of the invention discloses a user terminal. Referring to fig. 7, fig. 7 is a schematic structural diagram of a ue according to an embodiment of the present invention. As shown in fig. 7, the user terminal 700 may include:

an obtaining module 701, configured to obtain a measurement list from a network server, where the measurement list includes co-frequency and/or inter-frequency reselection parameters.

In the embodiment of the present invention, the network server may broadcast the measurement list to all the user terminals in the current cell, or may send the measurement list to each user terminal, respectively. Therefore, the manner of acquiring the measurement list from the network server by the acquisition module 701 may be broadcast by the network server, or may be separately transmitted to the user terminal 700 by the network server.

The same frequency is the frequency point where the current serving cell of the ue 700 is located, and the different frequency is the frequency point different from the frequency point where the current serving cell of the ue 700 is located. The reselection parameters of the same frequency and/or different frequencies can be understood as the reselection parameters of the frequency points, and the frequency points in the measurement list are the frequency points where the neighboring cells of the current serving cell of the user terminal 700 are located. When a frequency point corresponds to a cell, the reselection parameters of the same frequency and/or different frequencies can also be understood as the reselection parameters of the cell under each frequency point, that is, the reselection parameters of the neighboring cells of the current serving cell of the user terminal.

It should be noted that the reselection parameters included in the measurement list broadcast by the network server or sent to the user terminal may be reselection parameters of the frequency point where the neighboring cell of the current serving cell of the user terminal is located; or may be a reselection parameter of a cell adjacent to the current serving cell of the user terminal; the reselection parameter may also be a reselection parameter of a network type to which a neighboring cell of the current serving cell of the user terminal belongs, such as a 2G, 3G, or 4G network system, which is not limited in the embodiment of the present invention.

A measuring module 702, configured to perform signal measurement on cells under the frequency points supported by the user terminal 700 in the measurement list acquired by the acquiring module 701, so as to obtain a measurement parameter, which is the same as the reselection parameter type, corresponding to each cell.

A selecting module 703, configured to select, from the cells in the measurement list acquired by the acquiring module 701 and under the frequency supported by the user terminal 700, a cell with a measurement parameter better than a reselection parameter to form a target cell set.

A camping module 704, configured to select a first cell from the target cell set selected by the selecting module 703 for camping.

As a possible implementation manner, the specific manner of selecting the first cell from the target cell set for camping by the camping module 704 may be:

and randomly selecting a first cell from the target cell set and residing to the first cell.

Referring to fig. 8, fig. 8 is a schematic structural diagram of another ue according to an embodiment of the present invention. The ue 700 shown in fig. 8 is optimized based on the ue 700 shown in fig. 7. As shown in fig. 8, the ue 700 may further include a detecting module 705 and a determining module 706, where:

the detecting module 705 is configured to detect a moving speed of the ue 700.

A determining module 706, configured to determine whether the moving speed is less than or equal to a preset moving speed threshold, and if so, trigger the obtaining module 701 to perform an operation of obtaining the measurement list from the network server.

In this embodiment of the present invention, if the determining module 706 determines that the moving speed is greater than the preset moving speed threshold, in order to avoid cell reselection of the user terminal 700 being performed too frequently, or ping-pong reselection caused by back and forth residence in cells with different frequency points, the user terminal 700 may ignore a measurement list broadcasted or sent by a network server, and perform cell reselection only when a signal measurement parameter of a currently resident cell is less than a certain threshold, or select a cell with the same frequency point as the currently resident cell to reside when performing cell reselection, so as to reduce power consumption caused by frequent cell reselection when the moving speed of the user terminal 700 is higher.

As a possible implementation, the resident module 704 may include a selecting sub-module 7041, an obtaining sub-module 7042, a determining sub-module 7043, and a resident sub-module 7044, where:

the selecting submodule 7041 is configured to select a first cell from the target cell set selected by the selecting module 703 according to a preset order.

An obtaining submodule 7042 is configured to obtain a reselection factor for the first cell.

The obtaining sub-module 7042 may obtain the reselection factor of the first cell locally from the ue 700, or may obtain the reselection factor of the first cell from a network server.

A determining submodule 7043, configured to generate a random number for the first cell, determine whether the random number is smaller than or equal to the reselection factor, and if so, trigger the camping submodule 7044 to camp on the first cell; if not, the triggering selection sub-module 7041 selects the second cell from the target cell set again according to the preset sequence. Wherein the value range of the random number is 0-1.

A camping sub-module 7044, configured to camp on the first cell when the determining sub-module 7043 determines that the random number is smaller than or equal to the reselection factor of the cell.

As another possible implementation, the obtaining sub-module 7042 is further configured to, when the determining sub-module 7043 determines that the random number is greater than the reselection factor, obtain the number of times that the selecting sub-module 7041 selects the cells from the target cell set according to the preset order.

The determining submodule 7043 is further configured to determine whether the selection number is smaller than a preset selection control number, and if so, trigger the selecting submodule 7041 to select a second cell from the target cell set again according to a preset sequence; if not, the operation of camping on the first cell by the camping sub-module 7044 is triggered.

As another possible implementation manner, the measurement list acquired by the user terminal from the network server may further include reselection factors of frequency points, and then the acquiring sub-module 7042 may acquire the reselection factor of the first cell in a manner that:

and acquiring the reselection factor of the frequency point of the first cell from the measurement list.

In this embodiment of the present invention, after the adjusting module 708 adjusts the reselection factor of each cell in the target cell set, the obtaining sub-module 7041 in the residing module 704 may obtain the reselection factor of the currently selected cell from the adjusting module 708.

Referring to fig. 9, fig. 9 is a schematic structural diagram of another ue according to the embodiment of the present invention. The ue 700 shown in fig. 9 is optimized based on the ue 700 shown in fig. 8. As shown in fig. 9, the ue 700 may further include a configuration module 707 and an adjustment module 708, where:

a configuring module 707, configured to configure an average reselection factor for each cell in the target cell set after the selecting module 703 selects a target cell set with measurement parameters better than reselection parameters from the cells under the frequency supported by the user terminal 700. Wherein the average reselection factor is equal to the inverse of the number of cells in the target set of cells.

When considering cell loads in the target set of cells:

the obtaining module 701 is further configured to obtain load information of each cell in the target cell set from the network server.

The selecting module 703 is further configured to select a maximum load cell from the target cell set according to the load information acquired by the acquiring module 701.

An adjusting module 708, configured to reduce the average reselection factor of the maximum-loaded cell to obtain the reselection factor of the maximum-loaded cell, and increase the average reselection factors of the remaining cells in the target cell set except the maximum-loaded cell to obtain the reselection factors of the remaining cells. And the sum of the reselection factor of the maximum load cell and the reselection factors of the rest cells is 1.

As a possible implementation, when considering the priorities of the cells in the target set of cells:

the selecting module 703 is further configured to select a highest priority cell from the target cell set.

The adjusting module 708 is further configured to increase the average reselection factor of the highest priority cell to obtain the reselection factor of the highest priority cell, and decrease the average reselection factors of the rest of the cells in the target cell set except the highest priority cell to obtain the reselection factors of the rest of the cells. Wherein the sum of the reselection factor of the highest priority cell and the reselection factors of the rest cells is 1.

In this embodiment of the present invention, after the adjusting module 708 adjusts the reselection factors of the cells in the target cell set, the obtaining sub-module 7042 in the camping module 704 may obtain the reselection factor of the currently selected cell from the adjusting module 708.

Referring to fig. 10, fig. 10 is a schematic structural diagram of another ue according to an embodiment of the present invention. The user terminal 700 shown in fig. 10 is optimized based on the user terminal 700 shown in fig. 8 and 9. As shown in fig. 10, the user terminal 700 may further include an identification module 709, wherein:

a configuring module 707, configured to configure an average reselection factor for each cell in the target cell set after the selecting module 703 selects a target cell set with measurement parameters better than reselection parameters from all cells under the frequency supported by the user terminal 700. Wherein the average reselection factor is equal to the inverse of the number of cells in the target set of cells.

An identifying module 709, configured to identify a target cell different from the cell where the user terminal 700 historically resides from the target cell set selected by the selecting module 703. The frequency point of the target cell is different from the frequency point of the cell where the user terminal 700 has historically resided.

It should be noted that, the frequency point of the target cell is different from the frequency point of the cell where the user terminal 700 historically resides, and may be understood as: the frequency point of the target cell is the newly added frequency point of the user terminal 700.

Optionally, the identifying module 709 may further identify a newly added frequency point of the network, and if a cell under the newly added frequency point exists in the target cell set, the adjusting module 708 may also increase a reselection factor of the cell, so that when the camping module 704 selects the cell, the success rate of camping in the cell is higher, thereby realizing load balancing among the cells to a certain extent.

The adjusting module 708 is further configured to increase the average reselection factor of the target cell to obtain a reselection factor of the target cell, and decrease the average reselection factors of the rest of the cells in the target cell set except the target cell to obtain reselection factors of the rest of the cells. Wherein the sum of the reselection factor of the target cell and the reselection factors of the rest cells is 1.

Referring to fig. 11, fig. 11 is a schematic structural diagram of another ue according to the embodiment of the present invention. The user terminal 700 shown in fig. 11 is optimized based on the user terminal 700 shown in fig. 8, 9, and 10. As shown in fig. 11, when considering cell load in the target cell set, relationship between frequency points of the cell where the user terminal 700 resides historically, and cell priority at the same time:

a configuring module 707, configured to configure an average reselection factor for each cell in the target cell set after the selecting module 703 selects the target cell set with the measurement parameter better than the reselection parameter from all the cells under the frequency supported by the user terminal. Wherein the average reselection factor is equal to the inverse of the number of cells in the target set of cells.

The selecting module 703 is further configured to select a maximum load cell from the target cell set according to the load information obtained by the obtaining module 701, and select a highest priority cell from the target cell set.

An identifying module 709, configured to identify a target cell different from the cell where the ue historically resides from the target cell set selected by the selecting module 703. The frequency point of the target cell is different from the frequency point of the cell where the user terminal 700 has historically resided.

The adjusting module 708 is further configured to reduce the average reselection factor of the maximum-load cell, obtain a reselection factor of the maximum-load cell, increase the average reselection factor of the target cell, obtain a reselection factor of the target cell, increase the average reselection factor of the highest-priority cell, obtain a reselection factor of the highest-priority cell, and adjust the average reselection factors of the remaining cells, excluding the maximum-load cell, the target cell, and the highest-priority cell, in the target cell set according to the reselection factor of the maximum-load cell, the reselection factor of the target cell, and the reselection factor of the highest-priority cell, to obtain reselection factors of the remaining cells. And the sum of the reselection factor of the maximum load cell, the reselection factor of the target cell, the reselection factor of the highest priority cell and the reselection factors of the other cells is still 1.

It can be seen that, in the user terminals described in fig. 7 to 11, when the user terminal performs cell reselection, a reselection factor may be configured for each cell, and when the user terminal selects a cell from a target cell set satisfying a residence condition according to a preset sequence, the success rate of residence of each cell by the user terminal and the load between cells configured for each cell are the same, so that balance is achieved to a certain extent, and the utilization rate of network resources is improved. Furthermore, when the user terminal reselects the cell, the user terminal can directly reside in the cell when the selecting times of the selected cell are equal to the preset selecting control times, so that the situation that the user terminal cannot reside in the cell for a long time can be prevented, and the user terminal can rapidly reside in the cell meeting the residing condition. Meanwhile, when the moving speed of the user terminal is low, the user terminal can randomly reside in a cell meeting the residence condition, or reside in the cell according to the reselection factor of each cell, and when the moving speed of the user terminal is high, in order to avoid cell reselection ping-pong, the user terminal can perform cell reselection only when the signal measurement parameter of the currently resident cell is smaller than a certain threshold, or select a cell with the same frequency point as the currently resident cell when performing cell reselection, so that cell reselection ping-pong caused by the high moving speed of the user terminal can be avoided, and the power consumption of the user terminal is reduced.

Based on the network architecture shown in fig. 1, the embodiment of the invention discloses another user terminal. Referring to fig. 12, fig. 12 is a schematic structural diagram of another ue according to an embodiment of the present invention. As shown in fig. 12, the user terminal 120 may include: at least one processor 121, such as a CPU, a communication interface 122, a memory 123 and at least one communication bus 124, where the memory 123 may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory, and optionally, the memory 123 may also be at least one storage device located remotely from the processor 121. Wherein:

the communication bus 124 is used for realizing connection and communication among the components such as the processor 121, the communication interface 122 and the memory 123.

A set of program codes is stored in the memory 121 and the processor 121 is used to call up the program codes stored in the memory 123 for performing the following operations:

obtaining a measurement list from a network server through a communication interface 122, where the measurement list includes reselection parameters of the same frequency and/or different frequencies, the same frequency is a frequency point where a current serving cell of the user terminal 120 is located, and the different frequency is a frequency point different from the frequency point where the current serving cell of the user terminal 120 is located;

performing signal measurement on cells under the frequency points supported by the user terminal 120 in the measurement list to obtain measurement parameters corresponding to each cell and having the same type as the reselection parameters;

selecting cells with measurement parameters superior to reselection parameters from the cells under the frequency points supported by the user terminal 120 to form a target cell set;

and selecting a first cell from the target cell set for residing.

Optionally, the specific manner in which the processor 121 selects the first cell from the target cell set to camp on may be:

Optionally, the specific manner in which the processor 121 selects the first cell from the target cell set to camp on may also be:

selecting a first cell from the target cell set according to a preset sequence, and acquiring a reselection factor of the first cell;

and when the random number is smaller than or equal to the reselection factor, camping to the first cell.

Optionally, the processor 121 is further configured to call the program code stored in the memory 123, and perform the following operations:

when the random number is larger than the reselection factor, acquiring the selection times of selecting cells from a target cell set according to a preset sequence;

when the selection times are smaller than the preset selection control times, selecting a second cell from the target cell set again according to the preset sequence, and acquiring a reselection factor of the second cell;

and when the selection times are equal to the preset selection control times, the first cell is resided.

In this embodiment of the present invention, the reselection factor may be configured by a network server, or may be configured by the user terminal 120, which is not limited in this embodiment of the present invention.

Optionally, when the reselection factor is configured by the network server, the measurement list acquired by the processor 121 from the network server through the communication interface 122 may further include reselection factors of the same frequency and/or different frequencies, and therefore, a specific manner for the processor 121 to acquire the reselection factor of the first cell may be as follows:

As a possible implementation, when considering the cell loads in the target cell set, the processor 121 is further configured to invoke the program code stored in the memory 123 to perform the following operations before selecting a first cell from the target cell set and obtaining the reselection factor for the first cell:

configuring an average reselection factor for each cell in a target cell set, wherein the average reselection factor is equal to the inverse of the number of cells in the target cell set;

obtaining load information of each cell in the target cell set from the network server through the communication interface 122;

selecting a maximum load cell from the target cell set according to the load information, and reducing the average reselection factor of the maximum load cell to obtain the reselection factor of the maximum load cell;

As another possible implementation manner, when considering the relationship between the cell frequency point in the target cell set and the frequency point of the cell where the user terminal 120 resides historically, the processor 121 is further configured to invoke the program code stored in the memory 123 before selecting a first cell from the target cell set according to the preset order and acquiring the reselection factor of the first cell, and perform the following operations:

configuring an average reselection factor for each cell in the target cell set, wherein the average reselection factor is equal to the reciprocal of the number of cells in the target cell set;

identifying a target cell different from the cell where the user terminal 120 resides historically from the target cell set, and increasing an average reselection factor of the target cell to obtain a reselection factor of the target cell, wherein a frequency point of the target cell is different from a frequency point of the cell where the user terminal 120 resides historically;

It should be noted that, the frequency point of the target cell is different from the frequency point of the cell where the user terminal 120 historically resides, and may be understood as: the frequency point of the target cell is the newly added frequency point of the user terminal 120.

Optionally, the processor 121 may further identify a newly added frequency point of the network, and if a cell under the newly added frequency point exists in the target cell set, the processor 121 may also increase a reselection factor of the cell, so that when the processor 121 selects the cell, the success rate of residing in the cell is higher, thereby realizing load balancing among the cells to a certain extent.

As another possible implementation, when considering the priorities of the cells in the target cell set, the processor 121 is further configured to invoke the program code stored in the memory 123 before selecting a first cell from the target cell set according to a preset order and obtaining the reselection factor of the first cell, and perform the following operations:

selecting a highest priority cell from a target cell set, and increasing the average reselection factor of the highest priority cell to obtain the reselection factor of the highest priority cell;

and reducing the average reselection factors of other cells except the highest priority cell in the target cell set to obtain the reselection factors of the other cells, wherein the sum of the reselection factor of the highest priority cell and the reselection factors of the other cells is 1.

As another possible implementation manner, when considering cell loads in the target cell set, a relationship between a cell frequency and a cell frequency at which the user terminal 120 resides historically, and a cell priority, the processor 121 is further configured to invoke the program code stored in the memory 123 before selecting a first cell from the target cell set according to a preset order and acquiring a reselection factor of the first cell, and perform the following operations:

and according to the reselection factor of the maximum load cell, the reselection factor of the target cell and the reselection factor of the highest priority cell, adjusting the average reselection factors of the rest cells except the maximum load cell, the target cell and the highest priority cell in the target cell set to obtain the reselection factors of the rest cells, wherein the sum of the reselection factors of the maximum load cell, the target cell and the highest priority cell and the reselection factors of the rest cells is 1.

As another possible implementation, the processor 121 is further configured to call the program code stored in the memory 123, and perform the following operations:

detecting the moving speed of the user terminal 120, and determining whether the moving speed is less than or equal to a preset moving speed threshold;

when the moving speed is less than or equal to the preset moving speed threshold, an operation of acquiring the measurement list from the web server through the communication interface 122 is performed.

In the embodiment of the present invention, if it is determined that the moving speed is greater than the preset moving speed threshold, in order to avoid ping-pong reselection caused by too frequent cell reselection by the user terminal 120 or repeated residence in cells with different frequency points, the user terminal 120 may ignore the measurement list broadcasted or sent by the network server, and perform cell reselection only when the signal measurement parameter of the currently resident cell is less than a certain threshold, or select a cell with the same frequency point as the currently resident cell for residence when performing cell reselection, so as to reduce power consumption caused by frequent cell reselection when the moving speed of the user terminal 120 is higher.

It can be seen that, in the user terminal described in fig. 12, when the user terminal performs cell reselection, a reselection factor may be configured for each cell, and when the user terminal selects a cell from a target cell set that meets a residence condition according to a preset sequence, the success rate of residence of each cell by the user terminal and the load between each cell that is the same as the reselection factor configured for each cell achieve balance to a certain extent, thereby improving the network resource utilization rate. Furthermore, when the user terminal reselects the cell, the user terminal can directly reside in the cell when the selecting times of the selected cell are equal to the preset selecting control times, so that the situation that the user terminal cannot reside in the cell for a long time can be prevented, and the user terminal can rapidly reside in the cell meeting the residing condition. Meanwhile, when the moving speed of the user terminal is low, the user terminal can randomly reside in a cell meeting the residence condition, or reside in the cell according to the reselection factor of each cell, and when the moving speed of the user terminal is high, in order to avoid cell reselection ping-pong, the user terminal can perform cell reselection only when the signal measurement parameter of the currently resident cell is smaller than a certain threshold, or select a cell with the same frequency point as the currently resident cell when performing cell reselection, so that cell reselection ping-pong caused by the high moving speed of the user terminal can be avoided, and the power consumption of the user terminal is reduced.

Based on the network architecture shown in fig. 1, the embodiment of the invention discloses another user terminal. Referring to fig. 13, fig. 13 is a schematic structural diagram of another ue according to an embodiment of the present invention. As shown in fig. 13, the user terminal 130 may include a receiver 131, at least one processor 132, such as a CPU, and at least one bus 133, wherein:

the bus 133 may be a communication bus for implementing a communication connection between the receiver 131 and the processor 132, and the embodiment of the present invention is not limited thereto.

The receiver 131 is configured to receive a measurement list from a network server, where the measurement list includes reselection parameters of the same frequency and/or different frequencies, the same frequency is a frequency point where a current serving cell of the user terminal 130 is located, and the different frequency is a frequency point different from the frequency point where the current serving cell of the user terminal 130 is located.

A processor 132, configured to perform signal measurement on cells under the frequency supported by the user terminal 130 in the measurement list, to obtain measurement parameters corresponding to each cell and having the same type as the reselection parameter; selecting cells with measurement parameters superior to reselection parameters from the cells under the supporting frequency points of the user terminal 130 to form a target cell set; and selecting a first cell from the target cell set for residing.

As a possible implementation, the specific way for the processor 132 to select the first cell from the target cell set for camping may be:

As another possible implementation, the specific way for the processor 132 to select the first cell from the target cell set for camping may be:

As yet another possible implementation, the processor 132 may be further configured to:

In this embodiment of the present invention, the reselection factor may be configured by a network server, or may be configured by the user terminal 130, which is not limited in this embodiment of the present invention.

Optionally, when the reselection factor is configured by the network server, the measurement list received by the receiver 131 from the network server may further include reselection factors of the same frequency and/or different frequencies, and therefore, the specific manner for the processor 132 to obtain the reselection factor of the first cell may be:

In some possible embodiments, when considering the cell loads in the target cell set, the processor 132 may be further configured to, before selecting a first cell from the target cell set and obtaining a reselection factor for the first cell:

acquiring load information of each cell in a target cell set from a network server;

In a specific implementation, the specific way for the processor 132 to obtain the load information of each cell in the target cell set from the network server may be: the processor 132 controls the receiver 131 to receive load information of each cell in the target cell set from the network server.

In some possible embodiments, when considering the relationship between the cell frequency point in the target cell set and the frequency point of the cell where the user terminal 130 resides historically, the processor 132 may be further configured to, before selecting a first cell from the target cell set according to a preset order and acquiring a reselection factor of the first cell, perform the following operations:

identifying a target cell different from the cell where the user terminal 130 resides historically from the target cell set, and increasing an average reselection factor of the target cell to obtain a reselection factor of the target cell, wherein a frequency point of the target cell is different from a frequency point of the cell where the user terminal 130 resides historically;

It should be noted that, the frequency point of the target cell is different from the frequency point of the cell where the user terminal 130 historically resides, and may be understood as: the frequency point of the target cell is the newly added frequency point of the user terminal 130.

Optionally, the processor 132 may further identify a newly added frequency point of the network, and if a cell under the newly added frequency point exists in the target cell set, the processor 132 may also increase a reselection factor of the cell, so that when the processor 132 selects the cell, a success rate of residing in the cell is higher, thereby realizing load balancing among the cells to a certain extent.

In some possible embodiments, when considering the priorities of the cells in the target cell set, the processor 132 may be further configured to, before selecting a first cell from the target cell set according to a preset order and obtaining a reselection factor of the first cell:

In some possible embodiments, when considering cell loads in the target cell set, a relationship between a cell frequency point and a cell frequency point where the user terminal 130 resides historically, and a cell priority at the same time, the processor 132 may be further configured to, before selecting a first cell from the target cell set according to a preset order and obtaining a reselection factor of the first cell, perform the following operations:

acquiring load information of each cell in the target cell set from a network server;

In some possible implementations, the processor 132 may also be configured to perform the following operations:

detecting the moving speed of the user terminal 130, and determining whether the moving speed is less than or equal to a preset moving speed threshold;

when the moving speed is less than or equal to the preset moving speed threshold, the receiver 131 is triggered to perform an operation of receiving the measurement list from the web server.

It can be seen that, in the user terminal described in fig. 13, when the user terminal performs cell reselection, a reselection factor may be configured for each cell, and when the user terminal selects a cell from a target cell set that meets a residence condition according to a preset sequence, the success rate of residence of each cell by the user terminal and the load between each cell that is the same as the reselection factor configured for each cell achieve balance to a certain extent, thereby improving the network resource utilization rate. Furthermore, when the user terminal reselects the cell, the user terminal can directly reside in the cell when the selecting times of the selected cell are equal to the preset selecting control times, so that the situation that the user terminal cannot reside in the cell for a long time can be prevented, and the user terminal can rapidly reside in the cell meeting the residing condition. Meanwhile, when the moving speed of the user terminal is low, the user terminal can randomly reside in a cell meeting the residence condition, or reside in the cell according to the reselection factor of each cell, and when the moving speed of the user terminal is high, in order to avoid cell reselection ping-pong, the user terminal can perform cell reselection only when the signal measurement parameter of the currently resident cell is smaller than a certain threshold, or select a cell with the same frequency point as the currently resident cell when performing cell reselection, so that cell reselection ping-pong caused by the high moving speed of the user terminal can be avoided, and the power consumption of the user terminal is reduced.

It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.

The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.

The modules in the user terminal of the embodiment of the invention can be merged, divided and deleted according to actual needs.

The module in the embodiment of the present invention may be implemented by a general-purpose integrated circuit, such as a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC).

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

The cell reselection method and the user terminal disclosed in the embodiment of the present invention are described in detail above, and a specific example is applied in the description to explain the principle and the embodiment of the present invention, and the description of the above embodiment is only used to help understanding the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A method of cell reselection, comprising:

selecting a first cell from the target cell set for residing;

wherein the selecting the first cell from the target cell set for camping includes: selecting the first cell from the target cell set according to a preset sequence, and acquiring a reselection factor of the first cell; generating a random number for the first cell, and determining whether the random number is less than or equal to the reselection factor; camping on the first cell when the random number is less than or equal to the reselection factor.

2. The method of claim 1, wherein the selecting the first cell from the target set of cells for camping further comprises:

3. The method of claim 1, wherein the random number has a value in a range of 0 to 1.

4. The method of claim 3, further comprising:

judging whether the selection times are less than or equal to preset selection control times;

5. The method according to claim 1, 3 or 4, wherein before the selecting the first cell from the target cell set in the preset order and obtaining the reselection factor of the first cell, the method further comprises:

6. The method according to claim 1, 3 or 4, wherein before the selecting the first cell from the target cell set in the preset order and obtaining the reselection factor of the first cell, the method further comprises:

7. The method according to claim 1, 3 or 4, wherein before the selecting the first cell from the target cell set in the preset order and obtaining the reselection factor of the first cell, the method further comprises:

8. The method according to claim 1, 3 or 4, wherein before the selecting the first cell from the target cell set in the preset order and obtaining the reselection factor of the first cell, the method further comprises:

9. The method according to claim 1, 3 or 4, wherein the measurement list further includes reselection factors of the same frequency and/or different frequencies, and the obtaining the reselection factor of the first cell includes:

10. A user terminal, comprising:

a residing module, configured to select a first cell from the target cell set for residing;

the resident module comprises a selecting submodule, an obtaining submodule, a judging submodule and a resident submodule, wherein:

the judgment submodule is configured to generate a random number for the first cell, and judge whether the random number is less than or equal to the reselection factor;

11. The ue of claim 10, wherein the camping module selects the first cell from the target cell set for camping in a specific manner:

12. The UE of claim 10, wherein the random number has a value ranging from 0 to 1.

13. The user terminal of claim 12,

14. The user terminal according to claim 10, 12 or 13, wherein the user terminal further comprises:

the user terminal further comprises:

15. The user terminal according to claim 10, 12 or 13, wherein the user terminal further comprises:

16. The user terminal according to claim 10, 12 or 13, wherein the user terminal further comprises:

the user terminal further comprises:

17. The user terminal according to claim 10, 12 or 13, wherein the user terminal further comprises:

the user terminal further comprises:

18. The ue according to claim 10, 12 or 13, wherein the measurement list further includes reselection factors of the same frequency and/or different frequencies, and the specific manner for the obtaining sub-module to obtain the reselection factor of the first cell is as follows:

19. A user terminal, comprising:

the processor is used for measuring signals of cells under the frequency points supported by the user terminal in the measurement list to obtain measurement parameters corresponding to each cell and having the same type as the reselection parameters; selecting cells with the measurement parameters superior to the reselection parameters from the cells under the supporting frequency points of the user terminal to form a target cell set; selecting a first cell from the target cell set for residing;

the specific way for the processor to select the first cell from the target cell set for camping is as follows: selecting the first cell from the target cell set according to a preset sequence, and acquiring a reselection factor of the first cell; generating a random number for the first cell, and determining whether the random number is less than or equal to the reselection factor; camping on the first cell when the random number is less than or equal to the reselection factor.

20. The ue of claim 19, wherein the processor selects the first cell from the target cell set to camp on in a manner that:

21. The UE of claim 19, wherein the random number has a value ranging from 0 to 1.

22. The user terminal of claim 21,

the processor is further configured to obtain the number of times of selecting the cell from the target cell set according to the preset sequence when the random number is greater than the reselection factor; judging whether the selection times are smaller than preset selection control times or not; when the selection times are smaller than the preset selection control times, selecting a second cell from the target cell set again according to the preset sequence, and acquiring a reselection factor of the second cell; and when the selection times are equal to the preset selection control times, the mobile terminal camps in the first cell.

23. The user terminal according to claim 19 or 21 or 22,

24. The user terminal according to claim 19 or 21 or 22,

25. The user terminal according to claim 19 or 21 or 22,

26. The user terminal according to claim 19 or 21 or 22,

27. The ue according to claim 19, 21 or 22, wherein the measurement list further includes reselection factors of the same frequency and/or different frequencies, and the specific way for the processor to obtain the reselection factor of the first cell is as follows:

28. A computer-readable storage medium, characterized in that,

the computer-readable storage medium stores a computer program which, when executed by hardware, is capable of implementing the method of any one of claims 1 to 9.