CN108337716A

CN108337716A - cell selecting method, user equipment and base station

Info

Publication number: CN108337716A
Application number: CN201810271015.XA
Authority: CN
Inventors: 柴丽; 时洁; 蔺波
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-05-10
Filing date: 2013-05-10
Publication date: 2018-07-27
Anticipated expiration: 2033-05-10
Also published as: CN104365146A; CN108337716B; WO2014179987A1; CN104365146B

Abstract

A kind of cell selecting method of present invention offer, user equipment and base station, base station passes through the cell selection parameters that will be sent to UE, it is arranged to parameter value corresponding with the ability rating of UE, UE is allow to carry out the selection of cell according to the parameter value, the UE of different ability ratings has different selection results, to which different types of UE can select to match the cell of oneself function as early as possible, wireless resource utility efficiency is improved.

Description

Cell selection method, user equipment and base station

Technical Field

The present invention relates to communications technologies, and in particular, to a cell selection method, a user equipment, and a base station.

Background

With the development of communication technology, enhanced cells appear, and the functions of the enhanced cells are improved compared with those of common cells; for example, one Type of enhanced cell is a cell on a New Carrier Type (NCT) defined in Release-11. After a User Equipment (UE) is turned on, a cell selection process is performed to reside in a certain cell, and then a service can be initiated in the cell.

In the prior art, for a certain UE, it may attempt to camp on both a normal cell and an enhanced cell. However, for a UE of a legacy release, which may not camp on an enhanced cell, such an attempt process only increases the delay; even though some enhanced cells allow legacy UEs to camp on, the legacy UEs cannot fully utilize the enhanced functions of the enhanced cells, and the gains of the enhanced cells to the system are reduced. For the UE of the high release, if it tries to camp in the legacy cell, it also not only increases the delay, but also it is not favorable for camping in the legacy cell to fully exert the enhanced function of the enhanced cell. Therefore, in all the above cases, the utilization rate of radio resources is reduced because different types of UEs cannot select a cell matching their own functions as soon as possible.

Disclosure of Invention

The invention provides a cell selection method, user equipment and a base station, which are used for improving the utilization rate of wireless resources.

In a first aspect, a cell selection method is provided, including:

user Equipment (UE) acquires a cell selection parameter sent by a base station, wherein the cell selection parameter is set as a parameter value corresponding to the capability level of the UE by the base station;

and the UE performs cell selection processing according to the parameter value and determines whether to select the cell as a target cell.

With reference to the first aspect, in a first possible implementation manner, the cell selection parameter includes: a first parameter required by the cell selection criterion.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the cell selection parameter includes: a second parameter required for cell reselection criteria.

With reference to any one of the first aspect to the second possible implementation manner of the first aspect, in a third possible implementation manner, the setting, by the base station, the cell selection parameter as a parameter value corresponding to a capability level of the UE includes: if the UE is the UE with the first capability level, the parameter value is used for improving the threshold of selecting the cell as the target cell by the UE; if the UE is a UE with a second capability level, the parameter value is used to lower a threshold for the UE to select the cell as a target cell, where the first capability level is lower than the second capability level.

With reference to any one of the first aspect to the second possible implementation manner of the first aspect, in a fourth possible implementation manner, the cell selection parameter includes: a priority parameter corresponding to a capability level of the UE.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the priority parameter includes: a frequency priority corresponding to a frequency of the cell, or a cell priority corresponding to the cell, or a cell type priority corresponding to a type of the cell.

With reference to the fourth possible implementation manner of the first aspect, in a sixth possible implementation manner, the setting, by the base station, the cell selection parameter as a parameter value corresponding to the capability level of the UE includes: if the UE is the UE with the first capability level, the priority parameter takes the first level value; and if the UE is the UE with the second capability level, the priority parameter takes a second level value, wherein the first capability level is lower than the second capability level, and the first level value is lower than the second level value.

With reference to the fourth possible implementation manner of the first aspect, in a seventh possible implementation manner, the setting, by the base station, the cell selection parameter as a parameter value corresponding to the capability level of the UE includes: if the capability level of the UE is matched with the capability of the cell, the priority parameter takes a first level value; if the capability level of the UE does not match the capability of the cell, the priority parameter takes a second ranking value, wherein the first ranking value is higher than the second ranking value.

With reference to the fourth possible implementation manner of the first aspect, in an eighth possible implementation manner, the value of the priority parameter is 0 or 1; or, the value of the priority parameter is any natural number between 0 and n, and n represents a natural number.

With reference to the first aspect, in a ninth possible implementation manner, before the obtaining, by the UE, the cell selection parameter sent by the base station, the method further includes: the UE receives downlink discovery reference signaling DRS sent by a base station of the cell; and the UE discovers the cell according to the DRS.

With reference to the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner, the receiving, by the UE, downlink discovery reference signaling DRS sent by a base station of the cell includes: the UE receives the DRS according to the stored information of the DRS; or, the UE receives the DRS according to the information of the DRS of the cell acquired from the system message of the serving cell; or, the UE acquires information of the DRS of the cell through a dedicated signaling sent by a base station of a serving cell, and receives the DRS according to the information of the DRS; or the UE obtains information of a DRS of the corresponding cell according to a Physical Cell Identity (PCI) of the cell and receives the DRS according to the information of the DRS; or, the UE receives the DRS according to DRS information of the fixed subset of DRS.

With reference to the tenth possible implementation manner of the first aspect, in an eleventh possible implementation manner, the information of the DRS includes location and pattern feature information of the DRS.

With reference to the ninth possible implementation manner of the first aspect, in a twelfth possible implementation manner, the discovering, by the UE, the cell according to the DRS includes: the UE matched with the cell function for transmitting the DRS sets the priority of the cell for transmitting the DRS as a first priority; and/or, the UE which is not matched with the function of the cell for transmitting the DRS sets the priority of the cell for transmitting the DRS as a second priority; wherein the first priority is higher than the second priority.

With reference to the ninth possible implementation manner of the first aspect, in a thirteenth possible implementation manner, the discovering, by the UE, the cell according to the DRS includes: the UE selects a strongest cell from the plurality of cells found.

With reference to the thirteenth possible implementation manner of the first aspect, in a fourteenth possible implementation manner, the selecting, by the UE, a strongest cell from the multiple discovered cells includes: the UE with the first capability level sets the priority of an enhanced cell to be higher than that of a traditional cell, and selects the strongest cell from the enhanced cell; the UE with the second capability level sets the priority of the traditional cell to be higher than that of the enhanced cell, and selects the strongest cell from the traditional cells; wherein the first capability level is higher than the second capability level.

With reference to the fourteenth possible implementation manner of the first aspect, in a fifteenth possible implementation manner, the selecting, by the UE of the first capability level, a strongest cell from the enhanced cells includes: and if the UE with the first capability level cannot find the strongest cell in the enhanced cell, searching the strongest cell in the traditional cell.

With reference to the first aspect, in a sixteenth possible implementation manner, before the obtaining, by the UE, the cell selection parameter sent by the base station, the method further includes: the UE acquires a cell identifier of the cell; and the UE discovers the cell according to the cell identification.

In a second aspect, a cell selection method is provided, including:

setting the cell selection parameter to a parameter value corresponding to the capability level of the User Equipment (UE) by the base station of the cell;

and the base station sends the cell selection parameter to the UE so that the UE determines whether to select the cell as a target cell according to the parameter value.

With reference to the second aspect, in a first possible implementation manner, the cell selection parameter includes: a first parameter required by the cell selection criterion.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the cell selection parameter includes: a second parameter required for cell reselection criteria.

With reference to any one of the second aspect to the second possible implementation manner of the second aspect, in a third possible implementation manner, the setting, by the base station of the cell, a cell selection parameter to a parameter value corresponding to a capability level of a user equipment UE includes: if the UE is the UE with the first capability level, the parameter value set by the base station for the cell selection parameter is a threshold for improving the selection of the cell as a target cell by the UE; if the UE is the UE with the second capability level, the parameter value set by the base station for the cell selection parameter is used for reducing the threshold of the UE for selecting the cell as the target cell; wherein the first capability level is lower than the second capability level.

With reference to any one of the second aspect to the second possible implementation manner of the second aspect, in a fourth possible implementation manner, the cell selection parameter includes: a priority parameter corresponding to a capability level of the UE.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the priority parameter includes: a frequency priority corresponding to a frequency of the cell, or a cell priority corresponding to the cell, or a cell type priority corresponding to a type of the cell.

With reference to the fourth possible implementation manner of the second aspect, in a sixth possible implementation manner, the setting, by the base station of the cell, a cell selection parameter to a parameter value corresponding to a capability level of a user equipment UE includes: the base station sets a first grade value and a second grade value for the priority parameter, wherein the first grade value corresponds to the UE of the first capability level, and the second grade value corresponds to the UE of the second capability level; wherein the first level of capability is lower than the second level of capability, the first rating value being lower than the second rating value.

With reference to the fourth possible implementation manner of the second aspect, in a seventh possible implementation manner, the setting, by the base station of the cell, a cell selection parameter to a parameter value corresponding to a capability level of a user equipment UE includes: the base station sets a first grade value and a second grade value for the priority parameter, the second grade value corresponds to the UE of which the capability grade is matched with the capability of the cell, and the first grade value corresponds to the UE of which the capability grade is not matched with the capability of the cell; wherein the first ranking value is lower than the second ranking value.

With reference to the fourth possible implementation manner of the second aspect, in an eighth possible implementation manner, the value of the priority parameter is 0 or 1; or, the value of the priority parameter is any natural number between 0 and n, and n represents a natural number.

In a third aspect, a user equipment is provided, including:

a parameter obtaining unit, configured to obtain a cell selection parameter sent by a base station of a cell, where the cell selection parameter is set by the base station to a parameter value corresponding to a capability level of the UE;

and the selection processing unit is used for carrying out cell selection processing according to the parameter values and determining whether to select the cell as the target cell.

With reference to the third aspect, in a first possible implementation manner, the cell selection parameter obtained by the parameter obtaining unit includes: a first parameter required by the cell selection criterion.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the obtaining, by the parameter obtaining unit, the cell selection parameter includes: a second parameter required for cell reselection criteria.

With reference to any one of the third aspect to the second possible implementation manner of the third aspect, in a third possible implementation manner, if the UE is a UE with a first capability level, the parameter value obtained by the parameter obtaining unit is a threshold for improving the selection of the cell by the UE as a target cell; if the UE is a UE with a second capability level, the parameter value obtained by the parameter obtaining unit is a threshold for reducing the selection of the cell by the UE as a target cell; the first capability level is lower than the second capability level.

With reference to any one of the third aspect to the second possible implementation manner of the third aspect, in a fourth possible implementation manner, the obtaining of the cell selection parameter by the parameter obtaining unit includes: a priority parameter corresponding to a capability level of the UE.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner, the priority parameter includes: a frequency priority corresponding to a frequency of the cell, or a cell priority corresponding to the cell, or a cell type priority corresponding to a type of the cell.

With reference to the fourth possible implementation manner of the third aspect, in a sixth possible implementation manner, if the UE is a UE with a first capability level, the priority parameter acquired by the parameter acquiring unit acquires the first level value; if the UE is the UE with the second capability level, the priority parameter acquired by the parameter acquisition unit takes the second level value; wherein the first level of capability is lower than the second level of capability, the first rating value being lower than the second rating value.

With reference to the fourth possible implementation manner of the third aspect, in a seventh possible implementation manner, if the UE is a UE whose capability level matches the capability of the cell, the priority parameter acquired by the parameter acquiring unit takes a first level value; if the UE is the UE of which the capability level is not matched with the capability of the cell, the priority parameter acquired by the parameter acquisition unit takes a second level value; wherein the first ranking value is higher than the second ranking value.

With reference to the fourth possible implementation manner of the third aspect, in an eighth possible implementation manner, the value of the priority parameter is 0 or 1; or, the value of the priority parameter is any natural number between 0 and n, and n represents a natural number.

With reference to the third aspect, in a ninth possible implementation manner, the method further includes: a signaling receiving unit, configured to receive a downlink discovery reference signaling DRS sent by a base station of the cell; a first cell discovery unit, configured to discover the cell according to the DRS.

With reference to the ninth possible implementation manner of the third aspect, in a tenth possible implementation manner, the signaling receiving unit is specifically configured to: receiving the DRS according to the stored information of the DRS; or receiving the DRS according to information of the DRS of the cell acquired from a system message of a serving cell; or, obtaining information of DRS of a serving cell through a dedicated signaling sent by a base station of the cell, and receiving the DRS according to the information of DRS; or obtaining information of a DRS of the corresponding cell according to a Physical Cell Identity (PCI) of the cell, and receiving the DRS according to the information of the DRS; or receiving the DRS according to DRS information of the fixed subset of the DRS.

With reference to the tenth possible implementation manner of the third aspect, in an eleventh possible implementation manner, the information of the DRS includes location and pattern feature information of the DRS.

With reference to the ninth possible implementation manner of the third aspect, in a twelfth possible implementation manner, the selection processing unit is specifically configured to set, to a first priority, a priority of a cell that transmits a DRS, by a UE that is functionally matched with the cell that transmits the DRS; and/or, the UE which is not matched with the function of the cell for transmitting the DRS sets the priority of the cell for transmitting the DRS as a second priority; wherein the first priority is higher than the second priority.

With reference to the ninth possible implementation manner of the third aspect, in a thirteenth possible implementation manner, the selection processing unit is specifically configured to select a strongest cell from the multiple discovered cells.

With reference to the thirteenth possible implementation manner of the third aspect, in a fourteenth possible implementation manner, the selection processing unit is specifically configured to set a priority of an enhanced cell to be higher than a priority of a conventional cell, and select a strongest cell in the enhanced cell; or setting the priority of the traditional cells to be higher than that of the enhanced cells, and selecting the strongest cell from the traditional cells.

With reference to the fourteenth possible implementation manner of the third aspect, in a fifteenth possible implementation manner, the selection processing unit is further configured to search for the strongest cell in the conventional cell when the strongest cell cannot be found in the enhanced cell.

With reference to the third aspect, in a sixteenth possible implementation manner, the parameter obtaining unit is further configured to obtain a cell identifier of a cell before the UE obtains a cell selection parameter sent by a base station of the cell; further comprising: and the second cell discovery unit is used for discovering the cell according to the cell identification.

In a fourth aspect, a base station is provided, comprising:

a parameter setting unit, configured to set a cell selection parameter to a parameter value corresponding to a capability level of User Equipment (UE);

and the parameter sending unit is used for sending the cell selection parameter to the UE so that the UE determines whether to select the cell as a target cell according to the parameter value.

With reference to the fourth aspect, in a first possible implementation manner, the setting of the cell selection parameter by the parameter setting unit includes: a first parameter required by the cell selection criterion.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, the setting of the cell selection parameter by the parameter setting unit includes: a second parameter required for cell reselection criteria.

With reference to any one of the second possible implementation manners of the fourth aspect to the fourth aspect, in a third possible implementation manner, the parameter setting unit is specifically configured to: when the UE is the UE with the first capability level, setting a parameter value for the cell selection parameter to be a threshold for improving the selection of the cell as a target cell by the UE; when the UE is the UE with the second capability level, setting a parameter value for the cell selection parameter to be a threshold for reducing the selection of the cell as a target cell by the UE; the first capability level is lower than the second capability level.

With reference to any one of the second possible implementation manners of the fourth aspect to the fourth aspect, in a fourth possible implementation manner, the setting the cell selection parameter by the parameter setting unit includes: a priority parameter corresponding to a capability level of the UE.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the priority parameter includes: a frequency priority corresponding to a frequency of the cell, or a cell priority corresponding to the cell, or a cell type priority corresponding to a type of the cell.

With reference to the fourth possible implementation manner of the fourth aspect, in a sixth possible implementation manner, the parameter setting unit, when setting the priority parameter, is specifically configured to: the base station sets a first grade value and a second grade value for the priority parameter, wherein the first grade value corresponds to the UE of the first capability level, and the second grade value corresponds to the UE of the second capability level; wherein the first rating value is lower than the second rating value and the first capability level is lower than the second capability level.

With reference to the fourth possible implementation manner of the fourth aspect, in a seventh possible implementation manner, the parameter setting unit, when setting the priority parameter, is specifically configured to: setting a first rank value and a second rank value, wherein the second rank value corresponds to the UE of which the capability level is matched with the capability of the cell, and the first rank value corresponds to the UE of which the capability level is not matched with the capability of the cell; wherein the first ranking value is lower than the second ranking value.

With reference to the fourth possible implementation manner of the fourth aspect, in an eighth possible implementation manner, the value of the priority parameter is 0 or 1; or, the value of the priority parameter is any natural number between 0 and n, and n represents a natural number.

The cell selection method, the user equipment and the base station provided by the invention have the technical effects that: the base station sets the cell selection parameter sent to the UE into the parameter value corresponding to the UE version, so that the UE can select the cell according to the parameter value, different versions have different selection results, and different types of UE can select the cell matched with the function of the UE as soon as possible, thereby improving the utilization rate of wireless resources.

Drawings

Fig. 1 is a flowchart illustrating a cell selection method according to an embodiment of the present invention;

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

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

fig. 4 is a schematic diagram illustrating cell reselection in another embodiment of the cell selection method according to the present invention;

FIG. 5 is a schematic structural diagram of a UE according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a UE according to another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a UE according to another embodiment of the present invention;

FIG. 8 is a block diagram of a base station according to an embodiment of the present invention;

fig. 9 is a schematic physical structure diagram of a ue according to an embodiment of the present invention;

fig. 10 is a schematic physical structure diagram of a base station according to an embodiment of the present invention.

Detailed Description

The cell selection method of the embodiment of the invention mainly aims at the selection of an enhanced cell. The enhanced cell may be a cell with an enhanced function, or a cell on a new type of carrier; for example, the NCT cell proposed in Release-11 may be a cell on an enhanced non-backward compatible carrier, an ESC cell, a D2D cell, etc.

In the embodiment of the present invention, when the UE performs cell selection, the UE still performs cell selection according to a normal cell selection procedure, for example, the cell selection procedure includes (since it is a normal procedure, detailed description is omitted):

cell selection-selection of the strongest cell: after the UE is started, a certain cell is selected to reside firstly, and then service can be initiated in the cell; the UE firstly discovers the cells and then selects a cell with the strongest signal strength and/or the best signal quality from a plurality of discovered cells as a strongest cell;

cell selection-cell selection criteria: the UE judges whether the selected strongest cell meets the cell selection criterion, for example, whether the selected strongest cell meets the S criterion, if so, the UE selects the cell to reside;

cell selection-cell reselection: after the UE resides in the cell, the UE reselects the cell to replace the resident cell along with the movement of the UE; during the reselection process, the UE may also determine whether the cell to be replaced satisfies a cell reselection criterion (e.g., an R criterion), and may consider the priority of the cell, and other factors.

In the cell selection method according to the embodiment of the present invention, the description will be also made according to the above-described UE selection procedure; however, in order to make the UE with low capability level select the conventional cell as much as possible, and the UE with high capability level select the enhanced cell as much as possible, that is, the UE with different capability levels select the cell matched with its function as much as possible, so as to improve the utilization rate of the wireless resource. The UEs with different capability levels may be, for example, UEs of different releases. The strongest cell in the present invention refers to the cell with the strongest signal strength and/or the best signal quality.

The cell selection method according to the embodiment of the present invention is described in detail as follows:

example one

Fig. 1 is a flowchart illustrating a cell selection method according to an embodiment of the present invention, where the method is implemented by a UE, and as shown in fig. 1, the method may include:

101. the method comprises the steps that UE obtains cell selection parameters sent by a base station, and the cell selection parameters are set to parameter values corresponding to the capability level of the UE by the base station;

the cell selection parameter refers to a parameter required in the cell selection process, and the UE performs cell selection related calculation according to the cell selection parameter, where a parameter value of the cell selection parameter can affect a result of the UE selecting the cell, such as selection or non-selection. Several optional cell selection parameters are listed below, but those skilled in the art will appreciate that other parameters may be used in the implementation, and are not limited to the following parameters:

for example, the parameter (which may be referred to as a first parameter) used in the above-mentioned cell selection criterion (e.g., S criterion) is sent to the UE by the base station that needs the enhanced cell, and the UE performs calculation of the criterion to determine whether to select the enhanced cell;

for another example, the parameter (which may be referred to as a second parameter) used by a cell reselection criterion (e.g., an R criterion) in a cell reselection process may also be a parameter, where a base station that needs to enhance a cell sends the parameter to the UE, and the UE performs calculation of the cell reselection criterion according to the parameter to determine whether to select the enhanced cell as a cell after replacement;

for another example, the value of the priority parameter may also correspond to the capability level of the UE when the value of the priority parameter is set; the priority parameters include, for example: enhancing a frequency priority parameter corresponding to a frequency of a cell, or enhancing a cell priority corresponding to the cell, or enhancing a cell type priority corresponding to a type of the cell, and the like.

The UE may obtain the cell selection parameter sent by the base station of the enhanced cell directly from the base station of the enhanced cell or indirectly, for example, the base station of the enhanced cell sends the cell selection parameter to a serving cell where the UE is located through an interface between the base stations, and the base station of the serving cell carries the parameter in system information and sends the system information to the UE.

The cell selection parameter is set to a parameter value corresponding to the capability level of the UE, which means that the base station of the enhanced cell sets the cell selection parameter to a parameter value related to the capability level of the UE, so that when the UE selects a cell according to the parameter value, the UE selection results of different capability levels are different.

For example, taking the parameter a required in the S-criteria calculation as an example, in the prior art, the parameter a has only one value, i.e. a parameter value (for example, the parameter value is a1), and no matter what capability level the UE acquires the parameter value to perform the S-criteria calculation, the calculation result is the same, and the cell is selected or not selected. In this embodiment, the base station of the enhanced cell sets two parameter values for the parameter a, which are a first parameter value a2 corresponding to the low-energy-level UE and a second parameter value a3 corresponding to the high-energy-level UE, and the two parameter values are characterized in that the low-energy-level UE can only read a2 and cannot acquire a3, and the result obtained after the low-energy-level UE performs S-criterion calculation according to the a2 is that the enhanced cell is difficult to select relative to the high-energy-level UE; and the UE with high power level can only read a3, and cannot read a2, and the result of S-criterion calculation by the UE with high power level according to a3 is that it is easier to select the enhanced cell relative to the UE with low power level. It can be seen that a2 plays a role in increasing the threshold for low-power level UEs to select the enhanced cell as the target cell, and a3 plays a role in decreasing the threshold for high-power level UEs to select the enhanced cell as the target cell, thereby facilitating the matching of UE and cell functions.

For another example, in the example in the previous paragraph, the base station of the enhanced cell may not set two parameter values for the parameter a, for example, only set one parameter value a4, but the parameter value a4 is characterized in that the parameter value a4 can only be read by the UE with the high capability level, but cannot be acquired by the UE with the low capability level, compared with the original parameter value a 1; thus, the UE with low capability level cannot calculate the S-criterion at all, and certainly does not select the enhanced cell, and the UE with high capability level can acquire a4 and calculate the S-criterion accordingly, and is likely to select the enhanced cell. In this case, the base station sets the parameter a to the parameter value corresponding to the high-capability-level UE, so that the enhanced cell is more favorable for the selection of the high-capability-level UE.

102. And the UE performs cell selection processing according to the parameter value and determines whether to select the cell as a target cell.

The cell selection process is a selection step in the cell selection procedure, for example, at least one of a determination procedure of an S criterion, a determination procedure of an R criterion, and a determination procedure of a cell priority is performed, and whether or not to select an enhanced cell as a target cell, which is a cell selected by the UE, is determined according to a determination result. The UE performs cell selection processing according to the parameter value, and the selection results obtained by the UEs with different capability levels according to the parameter value are different, which may refer to the description in step 101 for reference examples, and are not described again.

Further, before acquiring the cell selection parameter sent by the base station of the enhanced cell, the UE also needs to discover the cell, and then performs the processes of selecting, reselecting, and the like of the strongest cell in the discovered cell. Then, the method for the UE to discover the enhanced cell may be flexibly configured as follows:

for example, the base station of the enhanced cell may send a new downlink signaling, i.e., Discovery Reference Signaling (DRS), which may also be referred to as Discovery Signaling (DS). The signaling provided by the base station of the enhanced cell to the UE may be a combination of at least one of: cell Reference Signal (CRS) transmitted on all subframes; SS (i.e., PSS/SSS: PSS Primary synchronization signal/SSS, Secondary synchronization signal); a channel-state information reference signal (CSI-RS); DRS. The UE utilizes a signaling combination of at least one of the above for cell discovery and/or measurement. The density of DRSs occurring on a unit subframe may be higher than the density of the existing CRS, and the transmission period of the DRSs may be longer than the transmission periods of the existing CRS and CSI-RS.

The above-mentioned DRS, its physical sequence and/or location on radio resources may be different from the legacy SS, but the DRS may include the SS function; for example, in a downlink signaling sent by a base station of an enhanced cell, an SS and a CRS are no longer sent, and a DRS capable of including functions of the SS and the CRS is sent; or, the DRS is also an SS, and only the relative positions of the PSS and the SSs are changed with respect to the original SS; or, the base station transmits both DRS including SS function and CRS, and the CRS may be CRS with 5ms transmission interval. In addition, there are various types of DRSs, such as the following four types:

case 1a the location and pattern (position and pattern) of the DRSs of all cells is fixed.

Case 1B the position and pattern (position and pattern) of DRS per cell is fixed; different cells may be different.

Case 1c, the position and pattern of DRS of each cell (including DRS distribution pattern on unit subframe and emission pattern between subframes, such as those subframes with period of 400ms on which DRS are emitted and those subframes on which DRS are not emitted) are flexible and can be configured; (the position of the subframe/PRB, transmission period of DRS, pattern, and density on a certain subframe); the DRS may be in a cell level or a UE level.

DRS resources are divided into two categories: one is a fixed subset, which is the same for each cell; one type is a flexible subset, which is different for each cell. Here, a DRS resource is a resource for carrying DRS information, a fixed subset, i.e. the location of the resource, is fixed, for example, a fixed is a certain RE bearer, and a flexible subset, i.e. the location of the RE carrying the DRS, is changed.

The UE may receive a DRS sent by a base station of an enhanced cell, and discover the enhanced cell according to the DRS; for example, an enhanced cell is discovered according to the location and pattern characteristics of the DRS; or, an enhanced cell is discovered according to DRS resources of a fixed subset of DRSs, and the like.

For another example, the downlink signaling sent by the base station of the enhanced cell is the same as that of a conventional cell, e.g., SS, CSI-RS, etc., and its physical sequence and/or location on the radio resource may be the same as those of conventional SS and CSI-RS. In this case, the UE may obtain the cell identifier of the enhanced cell in advance, and find the enhanced cell according to the cell identifier.

In the cell selection method of this embodiment, the UE obtains the parameter value of the cell selection parameter corresponding to its own capability level, and performs cell selection processing according to the parameter value, so as to obtain the selection result corresponding to its capability level, so that the UEs with different capability levels select the cell matching its capability as much as possible, thereby improving the utilization rate of the wireless resource.

Example two

Fig. 2 is a flowchart illustrating a cell selection method according to another embodiment of the present invention, where the method is implemented by a base station of an enhanced cell, and as shown in fig. 2, the method may include:

201. setting the cell selection parameter to a parameter value corresponding to the capability level of the User Equipment (UE) by the base station of the cell;

the cell selection parameter may be, for example, a parameter (which may be referred to as a first parameter) required by a cell selection criterion (e.g., S-criterion) used in cell selection, or a priority parameter (e.g., frequency priority, cell priority, or cell type priority) related to a cell, or a parameter (which may be referred to as a second parameter) required by a cell reselection criterion (e.g., R-criterion) used in cell reselection.

The base station sets the cell selection parameter to a parameter value corresponding to the capability level of the UE, for example, the base station sets a first parameter value and a second parameter value corresponding to the cell selection parameter, where the first parameter value is used for the UE with the higher capability level to select the enhanced cell as the threshold of the target cell, and the second parameter value is used for the UE with the lower capability level to select the enhanced cell as the threshold of the target cell.

202. And the base station sends the cell selection parameter to the UE so that the UE determines whether to select the cell as a target cell according to the parameter value.

After acquiring the cell selection parameter sent by the base station, the UE performs calculation according to the parameter to determine whether to select an enhanced cell as a target cell. For example, the UE with a low capability level can only obtain the first parameter value corresponding to its capability level, but cannot obtain the second parameter value, and after the UE performs calculation according to the first parameter value, it is difficult for the UE with a high capability level to select the enhanced cell. And the UE with the high capability level can only acquire the second parameter value corresponding to the capability level of the UE, but cannot acquire the first parameter value, the UE can only perform calculation according to the second parameter value, and the result obtained after calculation is that the enhanced cell is easier to select relative to the UE with the low capability level.

The process of the UE performing cell selection will be described in detail by several embodiments as follows:

EXAMPLE III

Fig. 3 is a flowchart illustrating a cell selection method according to another embodiment of the present invention, in which in this embodiment, a base station of an enhanced cell transmits a DRS, a UE discovers the enhanced cell according to the DRS, and the base station transmits a priority parameter corresponding to a capability level of the UE, and the UE performs selection according to the priority parameter when the cell is reselected. As shown in fig. 3, may include:

301. a serving cell where the UE is located obtains configuration information of a DRS of a neighboring cell through an interface between base stations;

wherein, supposing that the cell where the UE is currently located is called a service cell and the adjacent cell of the service cell is an enhanced cell, the base station of the service cell and the base station of the enhanced cell establish connection, and cell information of respective lower cells is interacted through interfaces between the base stations; the cell information includes: the information such as the carrier frequency band, the carrier type, the cell ID (identity), the configuration of the DRS of the cell may also include cell selection parameters corresponding to the cell, which are sent by each base station.

The interface between the base stations, such as an X2 interface, a wireless interface, etc., may also exchange information between two base stations in other manners. Optionally, in order to accelerate the subsequent cell selection process, the UE may also obtain configuration information of some cells in advance before the subsequent cell selection, such as configuration information related to synchronization relationship, antenna port SS, CRS, CSI-RS, and/or DRS; wherein the DRS configuration information comprises: antenna port information (the antenna port information may be the number of antennas and/or the number of antenna ports); frequency domain resource configuration information; code domain resource configuration information; subframe configuration information (including subframe offset information and periodicity information); and a ratio of the transmission power of the PDSCH and DRS assumed by the UE; synchronization information for the measured cells may also be included, such as SFN shift/subframe shift/symbol shift ("/" is "and/or" relationship). The information may be that the UE receives the notification of the neighboring, or co-covered, or similar-co-covered neighboring cells to the UE by means of broadcast or dedicated signaling.

In addition, when the base stations are connected via the S1 interface, signaling interaction may be performed via a Mobility Management Entity (MME), so that cell information of each base station and each cell under an adjacent base station may be obtained between the two base stations.

302. The method comprises the steps that UE receives a DRS sent by a base station of an enhanced cell, the DRS is used for discovering the enhanced cell, and a strongest cell is selected from the discovered cells;

if the UE has neighboring cells that are legacy cells, the UE may also receive downlink signaling, such as SS or CRS, sent by the base stations of the legacy cells. The UE finds the enhanced cell according to the location and pattern characteristics of the DRS, that is, the DRS is different from the location and pattern characteristics of the SS, CRS, and the like, and then the UE determines which cells are the legacy cells and which cells are the enhanced cells by using the difference between the DRS and the SS, CRS, and the like. The position and pattern characteristics, i.e. the aforementioned transmission pattern of DRS between subframes, the density on a certain subframe, etc.

The enhanced cells discovered by the UE may be multiple and may also discover multiple conventional cells at the same time, so that the UE with the high capability level may consider that the priority of the enhanced cell is higher and the priority of the conventional cell is lower, so as to preferentially find the strongest cell in the enhanced cells, and the UE with the low capability level considers that the priority of the conventional cell is higher than that of the enhanced cell, so as to preferentially find the strongest cell in the conventional cells; alternatively, it may be preset that the UE with low capability level cannot identify new signaling, such as DRS, sent by the base station of the enhanced cell at all, and only searches for the strongest cell in the conventional cell.

For example, for a UE with a high capability level to find a strongest cell in an enhanced cell, after the UE finds the enhanced cell by using DRS and performs time-frequency synchronization, the UE performs subsequent comparison of the strongest cell by using a measurement value of DRS, or performs subsequent comparison of the strongest cell by using a measurement value of CRS and/or CSI-RS, or performs subsequent comparison of the strongest cell by using a measurement value of at least one of DRS, CRS, and CSI-RS.

303. The UE judges whether the selected strongest cell meets S criteria, if so, the cell is selected as a suitable cell (survivable cell) to reside, otherwise, other cells are continuously searched;

in this embodiment, the S criterion is taken as a cell selection criterion as an example, a parameter required in the calculation of the criterion may be referred to as a first parameter, where the first parameter is a new parameter sent by the base station of the enhanced cell, for example, a parameter carried in DRS, such as Srxlev-e, Squal-e. Optionally, it may be set that only the UE with the high capability level can read the first parameter, and perform calculation on the S criterion, and determine whether the selected strongest cell meets the S criterion: if so, selecting the cell as a proper cell to reside; if not, the cell can not be selected as a suitable cell, and other cells are continuously searched. The UE with low capability level cannot read the first parameter, and cannot calculate the S-criterion, so that the UE cannot select the enhanced cell.

Alternatively, the new parameter (for example, Srxlev-e, Squal-e) may be set to be read by both the low-capability-level UE and the high-capability-level UE, but the new parameter has two parameter values respectively corresponding to the different capability levels UE, for example, the first parameter value s1 corresponding to the low-capability-level UE and the second parameter value s2 corresponding to the high-capability-level UE. The low-capability-level UE reads s1, and the result obtained from s1 is that the enhanced cell is not selected, so that the purpose of preventing the low-capability-level UE from selecting the enhanced cell is achieved through the setting of the parameter value; the UE with high capability level reads s2, and the result obtained from s2 is to select the enhanced cell, so that the purpose of facilitating the UE with high capability level to select the enhanced cell is achieved through setting the parameter value, so that the capability of the cell and the UE are matched. In the example in the above paragraph, the new parameter that can only be read by the high-capability level UE corresponds to the parameter value corresponding to the high-capability level UE.

Optionally, the step may also adopt conventional processing, that is, no new parameter is set, and both the low-capability-level UE and the high-capability-level UE can read the parameter, and the determination process of the above-mentioned S criterion is performed in the same manner. Therefore, the cell selection method of the embodiment of the invention comprises the following steps: the selection of the strongest cell, the S-criteria determination, and the subsequent cell reselection steps may be performed as long as any one of the steps can promote the matching of the UE and the cell functions, for example, no relevant improvement is performed in the previous step to prevent the low-capability-level UE from selecting the enhanced cell, but only the low-capability-level UE is prevented in the subsequent cell reselection.

In this embodiment, the parameter required by the S criterion is obtained by the UE reading the system message of the current serving cell, and the parameter is obtained by the base station of the previous serving cell from the base station of the enhanced cell.

304. The UE performs cell reselection according to the priority parameter corresponding to the enhanced cell;

even if the UE selects a suitable cell in 303, the UE continues cell reselection to keep itself in a cell with higher service quality. In the process of cell reselection, the UE not only considers the priority parameter of each candidate cell, but also calculates a cell reselection criterion according to the cell selection parameter of the candidate cell. Since the cell reselection process is a conventional technology, the present embodiment is not described in detail, and only the reselection process related to the improvement is described as follows:

in this embodiment, the base station of the enhanced cell performs improved setting on the priority parameter corresponding to the enhanced cell. The priority parameter may be, for example, a frequency priority corresponding to a frequency of an enhanced cell, a cell priority corresponding to an enhanced cell, or a cell type priority corresponding to an enhanced cell type.

For example, the base station of the enhanced cell may set a frequency priority for the enhanced cell and set two parameter values corresponding to the capability level of the UE for the frequency priority, one being the first parameter value (priority of R8/R9) corresponding to the UE with a low capability level, this parameter value being configured relatively low, i.e. taking a low level value; the other is a second parameter value (e.g., priority for (m: NCT, ESC, D2D, etc.)) corresponding to a high capability level UE, which is configured to be relatively high, i.e., to take a high level value. The low-capability-level UE does not have the capability of supporting the enhanced function of the enhanced cell, cannot read the second parameter value, only can read the first parameter value, and the UE decides not to select the enhanced cell any more due to the lower configuration (taking the low-level value) of the first parameter value; the UE with high capability level supports the enhanced function of the enhanced cell, can read the second parameter value, and determines to select the enhanced cell because the second parameter value is configured to be higher (higher level value).

For another example, the base station of the enhanced cell may also set a cell priority or a cell type priority for the enhanced cell, and each priority also sets two parameter values, which is similar to the above paragraph and will not be described in detail. The cell priority or the cell type priority may be that the base station of the enhanced cell notifies the UE through a broadcast message or a dedicated signaling, and the UE considers the comparison of the priority parameters in the process of deciding the cell reselection after receiving the parameters.

In addition, in the value-taking mode of the priority parameter, if the capability level of the UE is matched with the capability of the cell (for example, both the UE and the cell support a certain function), the priority parameter is taken as a high-level value; if the UE capability level does not match the cell capability level (e.g., UE support function a, cell support functions a and b), the priority parameter is ranked low. For example, the base station of the cell may set two values for the priority parameter, i.e., a low-level value and a high-level value; for the UE, if the UE judges that the capability level of the UE is matched with the capability of the cell, the UE can read the high level value; if the UE judges that the own capability level is not matched with the capability of the cell, the UE can read the low level value.

The value of the priority parameter can be obtained in various ways in specific implementation. For example, 0 or 1 may be taken, such as 0 for low rank, 1 for high rank; alternatively, any natural number between 0 and n (where n represents a natural number) may be taken, and the level may be determined according to the size of the natural number, for example, the low level is 2, and the high level is 5.

In this embodiment, the base station of the cell transmits the DRS, the UE discovers the cell according to the DRS, and the base station transmits a priority parameter corresponding to the capability level of the UE, and the UE performs selection according to the priority parameter when the cell is reselected. As also illustrated in connection with fig. 3, may include:

301. a serving cell where the UE is located obtains configuration information of a DRS of a neighboring cell through an interface between base stations (the step is optional);

302. A base station of a cell may send a new downlink signaling, that is, Discovery Reference Signaling (DRS), which may also be referred to as Discovery Signaling (DS). The signaling provided by the base station of the cell to the UE may be a combination of at least one of: cell Reference Signal (CRS) transmitted on all subframes; SS (i.e., PSS/SSS: PSS Primary synchronization signal/SSS, Secondary synchronization signal); a channel-state information reference signal (CSI-RS); DRS. The UE utilizes a signaling combination of at least one of the above for cell discovery and/or measurement. The density of DRSs occurring on a unit subframe may be higher than the density of the existing CRS, and the transmission period of the DRSs may be longer than the transmission periods of the existing CRS and CSI-RS.

The above-mentioned DRS, its physical sequence and/or location on radio resources may be different from the legacy SS, but the DRS may include the SS function; for example, in a downlink signaling sent by a base station of a cell, an SS and a CRS are no longer sent, and a DRS capable of including functions of the SS and the CRS is sent; or, the DRS is also an SS, and only the relative positions of the PSS and the SSs are changed with respect to the original SS; or, the base station transmits both DRS including SS function and CRS, and the CRS may be CRS with 5ms transmission interval. In addition, there are various types of DRSs, such as the following four types:

A step 303 of introduction;

The UE receives the DRS according to the stored information of the DRS;

or, the UE receives the DRS according to the information of the DRS of the cell acquired from the system message of the serving cell;

or, the UE acquires information of the DRS of the cell through a dedicated signaling sent by a base station of a serving cell, and receives the DRS according to the information of the DRS;

or the UE obtains information of a DRS of the corresponding cell according to a Physical Cell Identity (PCI) of the cell and receives the DRS according to the information of the DRS;

or, the UE receives the DRS according to DRS information of the fixed subset of DRS.

For example, the information of the DRS described above includes location and pattern feature information of the DRS.

Step 303 is introduced.

The UE receives the DRS according to the stored information of the DRS;

Step 303 is introduced.

The UE may receive a DRS transmitted by a base station of a cell according to information of a fixed subset of DRSs, and discover the cell according to the information of the fixed subset of DRSs; for example, a cell is discovered according to the location and pattern characteristics of the DRS; or, a cell is discovered according to the DRS resources of the fixed subset of DRS, etc.

And after the system message or the special message of the cell can be received, further obtaining a flexible subset of DRS resources.

Step 303 is introduced.

Case 1e, downlink signaling sent by the base station of the cell is the same as that of a conventional cell, for example, SS, CSI-RS, etc., and its physical sequence and/or location on radio resources may be the same as those of the conventional SS, CSI-RS. In this case, the UE may obtain a cell identifier of the cell in advance, and find the cell according to the cell identifier. Then, DRS is read again.

Step 303 is introduced.

303. The method comprises the steps that UE receives a DRS sent by a base station of a cell, the DRS is used for discovering the cell, and a strongest cell is selected from the discovered cells;

if the UE has neighboring cells that are legacy cells, the UE may also receive downlink signaling, such as SS or CRS, sent by the base stations of the legacy cells. The UE finds the cells according to the location and pattern features of the DRS, that is, the DRS is different from the location and pattern features of the SS, CRS, and the like, and then the UE determines which cells are the legacy cells and which cells are the enhanced cells by using the difference between the DRS and the SS, CRS, and the like. The position and pattern characteristics, i.e. the aforementioned transmission pattern of DRS between subframes, the density on a certain subframe, etc.

The enhanced cells discovered by the UE may be multiple, and may also discover multiple legacy cells and multiple enhanced cells at the same time, then, the UE with a high capability level may consider that the priority of the enhanced cell is higher, and the priority of the legacy cell is lower, so that the strongest cell is preferentially found in the enhanced cells, that is, the UE with a high capability level sets the priority of the enhanced cell to be higher than the priority of the legacy cell, and selects the strongest cell in the enhanced cells. Further, the optional UE with high capability level may find the strongest cell available in the legacy cell only when the UE cannot find the available cell in the enhanced cell, that is, cannot find the strongest cell.

The UE with low capability level considers that the priority of the traditional cell is higher than that of the enhanced cell, so that the strongest cell is preferentially searched in the traditional cell, namely the UE with low capability level sets the priority of the traditional cell to be higher than that of the enhanced cell, and selects the strongest cell in the traditional cell; alternatively, it may be preset that the UE with low capability level cannot identify new signaling such as DRS sent by the base station of the cell at all, and only finds the strongest cell among the conventional cells. The strongest cell may be defined as the cell with the strongest signal power and/or the smallest interference, or the cell signal satisfying the condition of a certain formula.

Or, the UE matched with the function of the cell transmitting the DRS sets the priority of the cell transmitting the DRS as a high priority; and/or, the UE which is not matched with the function of the cell for transmitting the DRS sets the priority of the cell for transmitting the DRS as low priority.

For example, for a UE with high energy level to find a strongest cell in a cell, after the UE finds the cell by using DRS and performs time-frequency synchronization, the UE compares the subsequent strongest cells by using the measurement value of DRS, or compares the subsequent strongest cells by using the measurement values of CRS and/or CSI-RS, or compares the subsequent strongest cells by using the measurement value of at least one of DRS, CRS, and CSI-RS.

The embodiment of the invention also provides a cell selection method separately, in the method, UE receives downlink discovery reference signaling DRS sent by a base station of a cell; discovering the cell according to the DRS; and selecting the cell.

Optionally, the receiving, by the UE, the downlink discovery reference signaling DRS sent by the base station of the cell includes:

the UE receives the DRS according to the stored information of the DRS;

Optionally, the information of the DRS includes location and pattern feature information of the DRS.

Optionally, the selecting, by the UE, the cell includes:

the UE matched with the cell function for transmitting the DRS sets the priority of the cell for transmitting the DRS as a high priority; and/or

And UE which is not matched with the cell function for transmitting the DRS sets the priority of the cell for transmitting the DRS as low priority.

Optionally, the selecting, by the UE, the cell includes: the UE selects a strongest one of the cells from the plurality of cells found.

Optionally, the selecting, by the UE, a strongest cell from the multiple cells found includes:

the UE with high capability level sets the priority of the enhanced cell to be higher than that of the traditional cell, and selects the strongest cell from the enhanced cells;

the UE of the low capability level sets the priority of the legacy cells, in which the strongest cell is selected, to be higher than the priority of the enhanced cells.

Optionally, the selecting, by the UE with a high capability level, a strongest cell from the enhanced cells includes:

and if the UE with the high capability level can not find the strongest cell in the enhanced cell, searching the strongest cell in the traditional cell.

Example four

Fig. 4 is a schematic diagram of cell reselection in another embodiment of the cell selection method of the present invention, as shown in fig. 4, it is assumed that UE-a in the diagram is a legacy UE (i.e., a UE with a low capability level), UE-B and UE-C are new UEs (i.e., a UE with a high capability level), cell1 and cell2 are legacy cells, and cell3, cell4 and cell5 are enhanced cells (e.g., NCT cells).

In the view of UE-a, for example, cell1 is higher priority, and cell3 and cell5 are lower priority, because the priority values of enhanced cell3 and cell5 read by UE-a are already configured lower by the base station, for example, as follows: assuming that the priority value of the conventional cell1 read by the UE-a is P1 ═ 5, and the priority value of the enhanced cell3 read by the UE-a is P2 ═ 3 (where "3" is the first parameter value configured by the base station for the UE-a with low capability level, and will be configured slightly lower than the normal value P1), the UE-a compares the priority values of the cell1 and the cell3, certainly, the cell1 is higher than the cell3, and the UE-a selects the cell1, that is, the setting of P2 ═ 3 makes it easier for the UE with low capability level to select the conventional cell matching its function.

Similar to the above reason, in view of the UE-B, it also receives the priority value of the conventional cell1 as P1 ═ 5, and reads the priority value of the enhanced cell3 as P3 ═ 7 (where "7" is the second parameter value configured by the base station for the UE-B with the high capability level, and is configured slightly higher than the normal value P1), then the UE-B compares the priority values of the cell1 and the cell3, and of course, the cell3 is higher than the cell1, and the UE-B selects the cell3, that is, the setting of P3 ═ 7 makes it easier for the UE with the high capability level to select the enhanced cell matching its function.

Example four

Compared with the embodiment, the second parameter required for calculating the cell reselection criterion is improved during the UE cell reselection, and the improvement manner is similar to the improvement of the priority parameter.

For example, in cell reselection, when cell reselection is performed between cells of the same frequency and the same priority frequency, calculation of a cell reselection criterion (e.g., an R criterion) needs to be performed. In this embodiment, two parameter values are also set for at least one of the calculation parameters related to the R criterion; for example, for the parameters Qmeans, and Qoffset used in the R criterion, two parameter values may be set, respectively, including: the first parameter value q1 corresponding to the low capability level UE and the second parameter value q2 corresponding to the high capability level UE enable the low capability level UE to read only q1, and use q1 to prevent the low capability level UE from selecting the enhanced cell, enable the high capability level UE to read only q2, and use q2 to facilitate the high capability level UE to select the enhanced cell.

Optionally, two parameter values q1 and q2 are set for a certain parameter (for example, the cell selection parameter Qmeans), in a specific implementation, the two different parameter values may also be respectively represented by two different parameters, for example, Qmeans-q 1, and a new parameter Qmeans-m-q 2 is introduced.

Examples are as follows: at least one of the rank criterion related calculated parameters of the enhanced cell (e.g. NCT cell) (e.g. Qmeas, Qoffset value), new parameters are introduced, such as Qmeas-m, Qoffset-m (m: NCT, ESC or D2D, etc.).

Conventional parameters, such as Qmeas, Qoffset (parameters of R8/R9): this parameter is read by a conventional UE (i.e., a low-capability-level UE), which does not have an enhanced function for supporting the enhanced cell and cannot read a newly introduced parameter value, and the configuration of this value enables the low-capability-level UE to more easily select the conventional cell, i.e., to more difficultly select the enhanced cell.

New parameters, such as Qmeas-m, Qoffset-m (m: NCT, ESC or D2D, etc.): this parameter may be read by a new type of UE (i.e., a high-capability-class UE) that supports enhanced functionality corresponding to the enhanced cell, and may read a newly introduced parameter value, which is configured to make it easier for the high-capability-class UE to select the enhanced cell.

Also taking the diagram of fig. 4 as an example, UE-a can only read the conventional cells of Qmeas, Qoffset, and the configuration of these parameters makes it easier for UE-a to select cell2 in f2 or cell1 in f3 as the camping cell. The UE-B can read new parameters such as Qmeas-m, information element of Qoffset-m, and the configuration of these parameters makes it easier for UE-B to select cell3 or cell5 in f2 for camping. If the UE resides in F2, it will support a mixed ordering of CRS values and DRS values.

The third embodiment is also applicable to the present embodiment, for example, in the cell reselection process, the scheme for improving the priority parameter described in the embodiment may be separately adopted, the scheme for improving the R criterion parameter described in the present embodiment may be separately adopted, or both the priority parameter and the R criterion parameter may be improved.

EXAMPLE five

In this embodiment, a difference from the above embodiments is that DRS resources transmitted by a base station of an enhanced cell are divided into two types, one is a fixed subset, each cell is the same, and the other is a flexible subset, and each cell is different. In this case, the UE may use DRS resources in a fixed subset of the DRS set to find an enhanced cell, and when comparing the strongest cells, the UE may use DRS resources in the fixed subset to compare subsequent strongest cells, or use measurement values of CRS and/or CSI-RS to compare the strongest cells, or use measurement values of at least one of DRS resources, CRS and CSI-RS in the fixed subset of the DRS set to compare the strongest cells.

In addition, in the calculation of the cell selection criterion, the UE of this embodiment may adopt the following scheme:

for example, the UE reads the system message of the current cell, obtains the parameters required for the cell selection criteria (S criteria), such as Srxlev/Squal or Srxlev-e/Squal-e, and determines whether the selected strongest cell satisfies the S criteria by using the measurement values of DRS resources in the fixed subset of the DRS set (i.e., the parameter values are the measurement values of DRS resources in the fixed subset of the DRS set, except that the parameter values can be represented by Srxlev/Squal or Srxlev-e/Squal-e; optionally, when represented by Srxlev/Squal, the parameter values can be read by both low-and high-capability level UEs, the parameter values include two parameter values corresponding to different-capability level UEs, respectively; when represented by Srxlev-e/Squal-e, the parameter values can be read by only high-capability level UEs): if so, selecting the cell as a proper cell to reside; if not, the cell can not be selected as a suitable cell, and other cells are continuously searched.

For another example, the UE reads the system message of the current cell, obtains parameters required by the cell selection criterion (S criterion), such as Srxlev/Squal or Srxlev-e/Squal-e, and the full set of DRS configurations of the current cell, and determines whether the selected strongest cell satisfies the S criterion by using the measurement values of DRS resources in the full set of DRS configurations: if so, selecting the cell as a proper cell to reside; if not, the cell can not be selected as a suitable cell, and other cells are continuously searched.

Further, in the cell reselection process, the UE of this embodiment may use the measurement value of the DRS resource in the full set of DRS configuration to make the decision of the R criterion; for example, the measurement value of the DRS resource may be a parameter value of a cell selection parameter required for the R-criteria calculation, and the parameter value may be readable only by the high-capability level UE, or may include a first parameter value readable by the low-capability level UE and a second parameter value readable by the high-capability level UE.

EXAMPLE six

In several embodiments above, the base station of the enhanced cell may send a new downlink signaling DRS, and in this embodiment, the downlink signaling sent by the base station of the enhanced cell may be the same as that of the legacy cell, such as an SS, a CSI-RS, and the like, and its physical sequence and/or location on the radio resource may be the same as that of the legacy SS, CSI-RS.

In this embodiment, the UE may obtain the cell identifier of the enhanced cell in advance, for example, the UE may notify the Physical Cell Identity (PCI) information of the enhanced cell through a broadcast mode or a dedicated signaling mode of the current cell and/or the neighboring cell, and the UE stores the cell identifier of the enhanced cell. Subsequently, when the UE acquires the cell identifier of a certain cell, it can determine whether the cell is an enhanced cell by comparing the cell identifier with the stored information, that is, the enhanced cell is discovered according to the cell identifier. This way the UE finds the enhanced cell more quickly.

In addition, in this way, the UE can also apply the method mentioned in the previous embodiments, for example, the base station of the enhanced cell still sends the cell selection parameter, and the parameter is still set by the base station to be different parameter values corresponding to UEs with different capability levels, so that the UE obtains different selection results accordingly.

EXAMPLE seven

The present embodiment provides a user equipment, which is capable of executing the method according to any embodiment of the present invention, and only the structure of the user equipment is briefly described below, and specific principles may be combined with reference to the method embodiment. Fig. 5 is a schematic structural diagram of an embodiment of a ue in the present invention, and as shown in fig. 5, the ue may include: a parameter acquisition unit 51 and a selection processing unit 52; wherein,

a parameter obtaining unit 51, configured to obtain a cell selection parameter sent by a base station of an enhanced cell, where the cell selection parameter is set by the base station to a parameter value corresponding to a capability level of the UE;

a selection processing unit 52, configured to perform cell selection processing according to the parameter value, and determine whether to select the enhanced cell as a target cell.

Further, the cell selection parameters acquired by the parameter acquiring unit 51 include: a first parameter required by the cell selection criterion.

Further, the cell selection parameters acquired by the parameter acquiring unit 51 include: a second parameter required for cell reselection criteria.

Further, if the UE is a UE with a first capability level, the parameter value obtained by the parameter obtaining unit 51 is a threshold for increasing the UE to select the target cell;

if the UE is a second capability level UE, the parameter value obtained by the parameter obtaining unit 51 is a threshold for reducing the UE to select the target cell; the first capability level is lower than the second capability level.

Further, the cell selection parameters acquired by the parameter acquiring unit 51 include: a priority parameter corresponding to a capability level of the UE. For example, the priority parameter includes: a frequency priority parameter corresponding to the frequency of the enhanced cell, or a cell priority corresponding to the enhanced cell, or a cell type priority corresponding to the type of the enhanced cell.

Further, if the UE is a UE with a first capability level, the priority parameter acquired by the parameter acquiring unit 51 takes a first level value; if the UE is a UE with a second capability level, the priority parameter acquired by the parameter acquiring unit 51 takes a second level value; wherein the first level of capability is lower than the second level of capability, the first rating value being lower than the second rating value.

Fig. 6 is a schematic structural diagram of another embodiment of the user equipment in the present invention, as shown in fig. 6, the user equipment may further include: a signaling receiving unit 53 and a first cell discovery unit 54; wherein,

a signaling receiving unit 53, configured to receive a downlink discovery reference signaling DRS sent by the base station of the enhanced cell;

a first cell discovery unit 54, configured to discover the enhanced cell according to the DRS.

Further, the first cell discovery unit 54 is specifically configured to: discovering the enhanced cell according to the position and pattern characteristics of the DRS; or, the enhanced cell is discovered according to the DRS resources of the fixed subset of the DRS.

Fig. 7 is a schematic structural diagram of a user equipment according to another embodiment of the present invention, as shown in fig. 7, in view of the structure shown in fig. 5, the user equipment further includes: a second cell discovery unit 55; wherein,

the parameter obtaining unit 51 is further configured to obtain a cell identifier of an enhanced cell before the UE obtains a cell selection parameter sent by a base station of the enhanced cell;

a second cell discovery unit 55, configured to discover the enhanced cell according to the cell identifier.

Further, if the UE is a UE whose capability level matches the capability of the cell, the priority parameter acquired by the parameter acquiring unit takes a first level value;

if the UE is the UE of which the capability level is not matched with the capability of the cell, the priority parameter acquired by the parameter acquisition unit takes a second level value; wherein the first ranking value is higher than the second ranking value.

Further, the value of the priority parameter is 0 or 1;

or, the value of the priority parameter is any natural number between 0 and n, and n represents a natural number.

Further, the signaling receiving unit is specifically configured to:

receiving the DRS according to the stored information of the DRS;

or receiving the DRS according to information of the DRS of the cell acquired from a system message of a serving cell;

or, obtaining information of DRS of a serving cell through a dedicated signaling sent by a base station of the cell, and receiving the DRS according to the information of DRS;

or obtaining information of a DRS of the corresponding cell according to a Physical Cell Identity (PCI) of the cell, and receiving the DRS according to the information of the DRS;

or receiving the DRS according to DRS information of the fixed subset of the DRS.

Further, the information of the DRS includes location and pattern feature information of the DRS.

Further, the selection processing unit is specifically configured to set, as a first priority, a priority of the cell that transmits the DRS, to the UE that is functionally matched with the cell that transmits the DRS; and/or, the UE which is not matched with the function of the cell for transmitting the DRS sets the priority of the cell for transmitting the DRS as a second priority; wherein the first priority is higher than the second priority.

Further, the selection processing unit is specifically configured to select a strongest cell from the multiple found cells.

Further, the selection processing unit is specifically configured to set a priority of an enhanced cell to be higher than a priority of a conventional cell, and select a strongest cell from the enhanced cells; or setting the priority of the traditional cells to be higher than that of the enhanced cells, and selecting the strongest cell from the traditional cells.

Further, the selection processing unit is further configured to search for the strongest cell in the legacy cell when the strongest cell cannot be found in the enhanced cell.

Example eight

The present embodiment provides a base station, which is capable of executing the method of any embodiment of the present invention, and only the structure of the base station is briefly described below, and specific principles may be combined with reference to the method embodiment. Fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention, and as shown in fig. 8, the base station may include: a parameter setting unit 81 and a parameter transmitting unit 82; wherein,

a parameter setting unit 81, configured to set a cell selection parameter to a parameter value corresponding to a capability level of the user equipment UE;

a parameter sending unit 82, configured to send the cell selection parameter to the UE, so that the UE determines whether to select the enhanced cell as the target cell according to the parameter value.

Further, the cell selection parameters set by the parameter setting unit 81 include: a first parameter required by the cell selection criterion.

Further, the cell selection parameters set by the parameter setting unit 81 include: a second parameter required for cell reselection criteria.

Further, the parameter setting unit 81 is specifically configured to: when the UE is the UE with the first capability level, setting a parameter value for the cell selection parameter to be a threshold for improving the selection of the UE as the target cell; when the UE is the UE with the second capability level, setting a parameter value for the cell selection parameter to be a threshold for reducing the selection of the UE as the target cell; the first capability level is lower than the second capability level.

Further, the cell selection parameters set by the parameter setting unit 81 include: a priority parameter corresponding to a capability level of the UE. For example, the priority parameter includes: a frequency priority parameter corresponding to the frequency of the enhanced cell, or a cell priority corresponding to the enhanced cell, or a cell type priority corresponding to the type of the enhanced cell.

Further, the parameter setting unit, when setting the priority parameter, is specifically configured to: the base station sets a first grade value and a second grade value for the priority parameter, wherein the first grade value corresponds to the UE of the first capability level, and the second grade value corresponds to the UE of the second capability level; wherein the first rating value is lower than the second rating value and the first capability level is lower than the second capability level.

Further, the parameter setting unit, when setting the priority parameter, is specifically configured to: setting a first rank value and a second rank value, wherein the second rank value corresponds to the UE of which the capability level is matched with the capability of the cell, and the first rank value corresponds to the UE of which the capability level is not matched with the capability of the cell; wherein the first ranking value is lower than the second ranking value.

Further, the value of the priority parameter is 0 or 1;

Example nine

Fig. 9 is a schematic physical structure diagram of an embodiment of the user equipment of the present invention, as shown in fig. 9, the user equipment includes a transmitter 91, a receiver 92, a memory 93, and a processor 94 respectively connected to the transmitter 91, the receiver 92, and the memory 93. Of course, the user equipment may include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, and the embodiment of the present invention is not limited in any way herein.

Wherein the memory 93 stores a set of program codes therein, and the processor 94 is configured to call the program codes stored in the memory 93 for performing the following operations:

obtaining, by a receiver 92, a cell selection parameter sent by a base station, where the cell selection parameter is set by the base station as a parameter value corresponding to a capability level of the UE; the processor 94 performs cell selection processing based on the parameter values to determine whether to select the cell as a target cell.

For example, the cell selection parameters include: a first parameter required for a cell selection criterion; and/or a second parameter required for the cell reselection criterion.

Optionally, if the UE is a UE with a first capability level, the parameter value is a threshold for increasing the selection of the cell by the UE as a target cell; if the UE is a UE with a second capability level, the parameter value is used to lower a threshold for the UE to select the cell as a target cell, where the first capability level is lower than the second capability level.

For another example, the cell selection parameters include: a priority parameter corresponding to a capability level of the UE. Optionally, the priority parameter includes: a frequency priority corresponding to a frequency of the cell, or a cell priority corresponding to the cell, or a cell type priority corresponding to a type of the cell.

Optionally, if the UE is a UE with a first capability level, the priority parameter takes a first level value; and if the UE is the UE with the second capability level, the priority parameter takes a second level value, wherein the first capability level is lower than the second capability level, and the first level value is lower than the second level value.

Optionally, if the capability level of the UE is matched with the capability of the cell, the priority parameter takes a first level value; if the capability level of the UE does not match the capability of the cell, the priority parameter takes a second ranking value, wherein the first ranking value is higher than the second ranking value.

Example ten

Fig. 10 is a schematic physical structure diagram of an embodiment of a base station of the present invention, and as shown in fig. 10, the base station includes a transmitter 1001, a receiver 1002, a memory 1003, and a processor 1004 respectively connected to the transmitter 1001, the receiver 1002, and the memory 1003. Of course, the base station may include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, and the embodiments of the present invention are not limited in this respect.

Wherein, the memory 1003 stores a set of program codes, and the processor 1004 is configured to call the program codes stored in the memory 1003 for performing the following operations:

the cell selection parameter is set to a parameter value corresponding to a capability level of User Equipment (UE), and the cell selection parameter is sent to the UE through a transmitter 1001, so that the UE determines whether to select the cell as a target cell according to the parameter value.

Optionally, if the UE is a UE with a first capability level, the processor 1004 sets a parameter value for the cell selection parameter, where the parameter value is used to raise a threshold for the UE to select the cell as a target cell; if the UE is a UE with a second capability level, the processor 1004 sets a parameter value for the cell selection parameter, which is used to lower a threshold for the UE to select the cell as a target cell; wherein the first capability level is lower than the second capability level.

Optionally, the processor 1004 sets a first rank value and a second rank value for the priority parameter, where the first rank value corresponds to a UE of a first capability level, and the second rank value corresponds to a UE of a second capability level; wherein the first level of capability is lower than the second level of capability, the first rating value being lower than the second rating value.

Optionally, the processor 1004 sets a first rank value and a second rank value for the priority parameter, where the second rank value corresponds to a UE whose capability level matches the capability of the cell, and the first rank value corresponds to a UE whose capability level does not match the capability of the cell; wherein the first ranking value is lower than the second ranking value.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for cell selection, comprising:

user Equipment (UE) acquires a parameter value of a cell selection parameter from a base station, wherein the parameter value corresponds to the capability level of the UE;

2. The method of claim 1, wherein the cell selection parameter comprises: a first parameter required for cell selection criteria, and/or a second parameter required for cell reselection criteria.

3. The method according to claim 1 or 2,

if the UE is the UE with the first capability level, the parameter value is used for improving the threshold of selecting the cell as the target cell by the UE;

if the UE is a UE with a second capability level, the parameter value is used for reducing the threshold of selecting the cell as a target cell by the UE;

wherein the first capability level is lower than the second capability level.

4. The method of claim 1 or 2, wherein the cell selection parameter comprises a first parameter value and a second parameter value corresponding to the cell selection parameter, the first parameter value is used for a threshold for a UE with a first capability level to select the cell as a target cell, the second parameter value is used for a threshold for a UE with a second capability level to select the cell as a target cell, wherein the first capability level is lower than the second capability level, and the first parameter value is read by the UE with the first capability level, and the second parameter value is read by the UE with the second capability level;

when the UE is the UE with the first capability level, the parameter value obtained by the UE from the base station is the first parameter value, and when the UE is the UE with the second capability level, the parameter value obtained by the UE from the base station is the second parameter value.

5. The method according to claim 1 or 2, wherein the cell selection parameters comprise: a priority parameter corresponding to a capability level of the UE.

6. The method of claim 5, wherein the priority parameter comprises:

the frequency priority corresponding to the frequency of the cell, or,

the cell priority corresponding to the cell, or,

a cell type priority corresponding to the type of the cell.

7. The method of claim 5,

if the UE is the UE with the first capability level, the priority parameter takes the first level value;

if the UE is a UE with a second capability level, the priority parameter takes a second level value, wherein the first capability level is lower than the second capability level, and the first level value is lower than the second level value.

8. The method of claim 5,

if the capability level of the UE is matched with the capability of the cell, the priority parameter takes a first level value;

if the capability level of the UE does not match the capability of the cell, the priority parameter takes a second ranking value, wherein the first ranking value is higher than the second ranking value.

9. The method of claim 5,

the value of the priority parameter is 0 or 1;

10. The method according to any of claims 1 to 9, further comprising, before the UE obtains the parameter value of the cell selection parameter from the base station:

the UE receives downlink discovery reference signaling DRS from the base station;

and the UE discovers the cell according to the DRS.

11. The method of claim 10, wherein the UE discovering the cell according to the DRS comprises:

the UE selects a strongest cell satisfying a cell selection criterion or a cell reselection criterion as the cell from the plurality of found cells.

12. The method of claim 11, wherein the UE selects the strongest cell from the plurality of cells found, comprising:

the UE with the first capability level sets the priority of an enhanced cell to be higher than that of a traditional cell, and selects the strongest cell from the enhanced cell;

the UE with the second capability level sets the priority of a traditional cell to be higher than that of an enhanced cell, and selects the strongest cell from the traditional cell; wherein the first capability level is higher than the second capability level.

13. The method of claim 12, further comprising:

and if the UE with the first capability level cannot find the strongest cell in the enhanced cell, searching the strongest cell in the traditional cell.

14. The method according to any of claims 1 to 9, wherein before the UE obtains the parameter value of the cell selection parameter from the base station, the method further comprises:

the UE acquires a cell identifier of the cell;

and the UE discovers the cell according to the cell identification.

15. A method for cell selection, comprising:

and the base station sends the cell selection parameter to the UE, so that the UE determines whether to select the cell as a target cell according to the parameter value.

16. The method of claim 15, wherein the cell selection parameter comprises: a first parameter required for cell selection criteria, and/or a second parameter required for cell reselection criteria.

17. The method of claim 15 or 16, wherein the base station sets the cell selection parameter to a parameter value corresponding to the capability level of the UE, comprising:

if the UE is the UE with the first capability level, the parameter value set by the base station for the cell selection parameter is a threshold for improving the selection of the cell as a target cell by the UE;

if the UE is the UE with the second capability level, the parameter value set by the base station for the cell selection parameter is used for reducing the threshold of selecting the cell as the target cell by the UE; wherein the first capability level is lower than the second capability level.

18. The method of claim 15 or 16, wherein the base station sets the cell selection parameter to a parameter value corresponding to the capability level of the UE, comprising:

and the base station sets a first parameter value and a second parameter value corresponding to the cell selection parameter, wherein the first parameter value is used for increasing the threshold of the UE with a first capability level for selecting the cell as a target cell, the second parameter value is used for decreasing the threshold of the UE with a second capability level for selecting the cell as the target cell, the first capability level is lower than the second capability level, the first parameter is read by the UE with the first capability level, and the second parameter is read by the UE with the second capability level.

19. The method according to claim 15 or 16, wherein the cell selection parameters comprise: a priority parameter corresponding to a capability level of the UE.

20. The method of claim 19, wherein the priority parameter comprises:

the frequency priority corresponding to the frequency of the cell, or,

the cell priority corresponding to the cell, or,

a cell type priority corresponding to the type of the cell.

21. The method of claim 19, wherein the base station sets the cell selection parameter to a parameter value corresponding to a capability level of the UE, comprising:

the base station sets a first grade value and a second grade value for the priority parameter, wherein the first grade value corresponds to the UE of the first capability level, and the second grade value corresponds to the UE of the second capability level; wherein the first level of capability is lower than the second level of capability, the first rating value is lower than the second rating value; or,

the base station sets a first grade value and a second grade value for the priority parameter, the second grade value corresponds to the UE of which the capability grade is matched with the capability of the cell, and the first grade value corresponds to the UE of which the capability grade is not matched with the capability of the cell; wherein the first ranking value is lower than the second ranking value.

22. The method of claim 19,

the value of the priority parameter is 0 or 1;

23. An apparatus for a User Equipment (UE), comprising:

a parameter obtaining unit, configured to obtain a parameter value of a cell selection parameter from a base station, where the parameter value corresponds to a capability level of the UE;

24. The apparatus of claim 23, wherein the cell selection parameter comprises: a first parameter required for cell selection criteria, and/or a second parameter required for cell reselection criteria.

25. The apparatus of claim 23 or 24,

wherein the first capability level is lower than the second capability level.

26. The apparatus of claim 23 or 24, wherein the cell selection parameter comprises a first parameter value and a second parameter value corresponding to the cell selection parameter, the first parameter value is used for a UE with a first capability level to increase a threshold for selecting the cell as a target cell, the second parameter value is used for a UE with a second capability level to decrease the threshold for selecting the cell as the target cell, wherein the first capability level is lower than the second capability level, and the first parameter value is read by the UE with the first capability level, and the second parameter value is read by the UE with the second capability level;

when the UE is a UE with a first capability level, the parameter value obtained by the parameter obtaining unit from the base station is the first parameter value, and when the UE is a UE with a second capability level, the parameter value obtained by the parameter obtaining unit from the base station is the second parameter value.

27. The apparatus according to claim 23 or 24, wherein the cell selection parameter obtained by the parameter obtaining unit includes:

a priority parameter corresponding to a capability level of the UE.

28. The apparatus of claim 27, wherein the priority parameter comprises:

a frequency priority parameter corresponding to a frequency of the cell, or,

the cell priority corresponding to the cell, or,

a cell type priority corresponding to the type of the cell.

29. The apparatus of claim 27,

if the UE is the UE with the second capability level, the priority parameter takes the second level value; wherein the first level of capability is lower than the second level of capability, the first rating value being lower than the second rating value.

30. The apparatus of claim 27,

if the UE is the UE with the capability level matched with the capability of the cell, the priority parameter takes a first level value;

if the UE is the UE of which the capability level is not matched with the capability of the cell, the priority parameter takes a second level value; wherein the first ranking value is higher than the second ranking value.

31. The apparatus of claim 27,

the value of the priority parameter is 0 or 1;

32. The apparatus of any one of claims 23 to 31, further comprising:

a signaling receiving unit, configured to receive a downlink discovery reference signaling DRS from the base station;

a first cell discovery unit, configured to discover the cell according to the DRS.

33. The apparatus of claim 32,

the selection processing unit is specifically configured to select, as the cell, a strongest cell that satisfies a cell selection criterion or a cell reselection criterion from the multiple discovered cells.

34. The apparatus of claim 33,

the selection processing unit is specifically configured to set a priority of an enhanced cell to be higher than a priority of a conventional cell, and select the strongest cell from the enhanced cell; or setting the priority of the traditional cell to be higher than that of the enhanced cell, and selecting the strongest cell from the traditional cells.

35. The apparatus of claim 34,

the selection processing unit is further configured to search for the strongest cell in the legacy cell when the strongest cell cannot be found in the enhanced cell.

36. The apparatus of any one of claims 23 to 31,

the parameter obtaining unit is further configured to obtain a cell identifier of the cell before obtaining the parameter value;

the device further comprises: and the cell discovery unit is used for discovering the cell according to the cell identification.

37. An apparatus for a User Equipment (UE), comprising: a processor and a memory, the processor being configured to perform the method of any of claims 1 to 14.

38. A user equipment comprising an apparatus as claimed in any one of claims 23 to 37.

39. A computer storage medium comprising a program which, when executed by a processor, is adapted to carry out the method of any one of claims 1 to 14.

40. A base station, comprising:

a parameter setting unit, configured to set a cell selection parameter to a parameter value corresponding to a capability level of user equipment UE;

a parameter sending unit, configured to send the cell selection parameter to the UE, where the cell selection parameter is used for the UE to determine whether to select the cell as the target cell according to the parameter value.

41. The base station of claim 40, wherein the cell selection parameters comprise: a first parameter required for cell selection criteria, and/or a second parameter required for cell reselection criteria.

42. The base station according to claim 40 or 41,

the parameter setting unit is specifically configured to: when the UE is the UE with the first capability level, setting a parameter value for the cell selection parameter to be a threshold for improving the selection of the cell as a target cell by the UE; when the UE is the UE with the second capability level, setting a parameter value for the cell selection parameter to be a threshold for reducing the selection of the cell as a target cell by the UE; the first capability level is lower than the second capability level.

43. The base station according to claim 40 or 41,

the parameter setting unit is specifically configured to: setting a first parameter value and a second parameter value corresponding to the cell selection parameter, wherein the first parameter value is used for increasing a threshold of UE with a first capability level for selecting the cell as a target cell, the second parameter value is used for decreasing a threshold of UE with a second capability level for selecting the cell as the target cell, the first capability level is lower than the second capability level, the first parameter is read by the UE with the first capability level, and the second parameter is read by the UE with the second capability level.

44. The base station according to claim 40 or 41, wherein the cell selection parameter set by the parameter setting unit comprises: a priority parameter corresponding to a capability level of the UE.

45. The base station of claim 44, wherein the priority parameter comprises:

a frequency priority parameter corresponding to a frequency of the cell, or,

the cell priority corresponding to the cell, or,

a cell type priority corresponding to the type of the cell.

46. The base station of claim 44,

the parameter setting unit, when setting the priority parameter, is specifically configured to: setting a first grade value and a second grade value for the priority parameter, wherein the first grade value corresponds to the UE of the first capability level, and the second grade value corresponds to the UE of the second capability level; wherein the first rating value is lower than the second rating value, the first capability level is lower than the second capability level; or,

the parameter setting unit, when setting the priority parameter, is specifically configured to: setting a first rank value and a second rank value, wherein the second rank value corresponds to the UE of which the capability level is matched with the capability of the cell, and the first rank value corresponds to the UE of which the capability level is not matched with the capability of the cell; wherein the first ranking value is lower than the second ranking value.

47. The base station of claim 44,

the value of the priority parameter is 0 or 1;

48. A base station, comprising: a processor and a memory, the processor being configured to perform the method of any of claims 15 to 22.

49. A computer storage medium comprising a program which, when executed by a processor, is operative to perform the method of any of claims 15 to 22.