Cell selection method and device

Abstract

The invention provides a cell selection method and device. The problem that wireless communication between terminal equipment and a selected cell is abnormal can be solved. The method comprises: a terminal device can obtain a first offset of at least one first to-be-selected cell, the first offset being used for determining a cell selection parameter of the at least one first to-be-selected cell, the cell selection parameter comprising: a cell selection reception level value Srxlev and / or a cell selection reception quality value Squal. Afterwards, the terminal device can determine the cell selection parameter of the at least one first to-be-selected cell by using the first offset according to the uplink capability information of the terminal device, the uplink capability information being used for indicating whether the terminal device can perform uplink enhancement. Then, the terminal device can determine a first cell according to the cell selection parameter, the first cell being one of the at least one first to-be-selected cell.

Description

[0001] This application is a divisional application. The application number of the original application is 202180051996.7, and the original application date is January 7, 2021. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of communications, and in particular to a method and device for selecting a cell. Background Art

[0003] In a cellular communication system, when a terminal device (eg, a user equipment (UE)) is turned on, it can select a cell to reside in from at least one cell according to a cell selection criterion (also referred to as an S criterion). Afterwards, the terminal can perform wireless communication with the selected cell.

[0004] However, different terminal devices have different uplink transmission powers. For example, some reduced capability UEs (REDCAP UEs) are introduced into existing communication systems. The uplink transmission power of such terminal devices is low, which may be lower than that of other terminal devices in the existing network. In this way, although such terminal devices determine that they are within the downlink coverage indicated by the cell selection criteria, such terminals may not be able to communicate wirelessly with the cell due to insufficient uplink transmission power.

[0005] At present, terminals with reduced capabilities can improve the uplink transmission power of the terminal through some uplink enhancement technologies (also called coverage recovery technologies), so that the terminal can wirelessly communicate with the cell within the coverage of the cell. However, the uplink enhancement capability (also called coverage recovery capability) is an optional capability possessed by the terminal and the network equipment. In other words, the terminal and the network equipment may support uplink enhancement or may not support uplink enhancement. When both the terminal and the network equipment support uplink enhancement, uplink enhancement can improve the uplink transmission power of the terminal. When the terminal or the network equipment does not support uplink enhancement, the terminal still cannot improve the uplink transmission power.

[0006] Therefore, when performing cell selection, if terminals that can perform uplink enhancement and terminals that cannot perform uplink enhancement select cells according to the same selection criteria, some terminals may be unable to perform wireless communication with the selected cells. Summary of the invention

[0007] The embodiments of the present application provide a method and device for selecting a cell, which can solve the problem of abnormal wireless communication between a terminal and a selected cell.

[0008] In order to achieve the above objectives, this application adopts the following technical solutions:

[0009] In a first aspect, a method for selecting a cell is provided. The method for selecting a cell includes: a terminal device obtains a first offset of at least one first cell to be selected, and the first offset is used to determine a cell selection parameter of at least one first cell to be selected, and the cell selection parameter includes: a cell selection reception level value Srxlev and / or a cell selection reception quality value Squal. Afterwards, the terminal device may determine the cell selection parameter of at least one first cell to be selected using the first offset according to the uplink capability information of the terminal device (used to indicate whether the terminal device is capable of uplink enhancement). Then, the terminal device may determine the first cell according to the cell selection parameter.

[0010] Based on the above technical solution, when the terminal device uses the first offset to determine the cell selection parameters (Srxlev and / or Squal), the uplink capability information of the terminal device is combined. The uplink capability information of the terminal device can indicate whether the terminal device is capable of uplink enhancement. In this way, using this solution, for terminal devices that can perform uplink enhancement, their cell selection parameters may be different from those of terminal devices that cannot perform uplink enhancement. Therefore, in this solution, different cell selection parameters can be used for cell selection for the above two types of terminal devices to ensure normal communication between the terminal device and the selected cell.

[0011] In combination with the first aspect, in a possible design, the first offset may include a first type offset and / or a second type offset. The first type offset is used to determine Srxlev, and the second type offset is used to determine Squal. That is, the first offset may be used to determine Srxlev and / or Squal.

[0012] In combination with the first aspect, in another possible design, the first offset may include the first type of offset. The first type of offset may include a first offset parameter and a second offset parameter. The first offset parameter and the second offset parameter are both used to determine Srxlev. The first offset parameter is greater than the second offset parameter.

[0013] For any first to-be-selected cell among the at least one first to-be-selected cell, the terminal device may perform the following steps to determine the Srxlev of the first to-be-selected cell:

[0014] If the uplink capability information of the terminal device indicates that the terminal device can perform uplink enhancement, the terminal device uses the first offset parameter in the first type of offset to determine the Srxlev of the first selected cell; if the uplink capability information indicates that the terminal device cannot perform uplink enhancement, the terminal device uses the second offset parameter in the first type of offset to determine the Srxlev of the first selected cell.

[0015] The terminal device being able to perform uplink enhancement includes: the terminal device supporting uplink enhancement, and the first candidate cell supporting uplink enhancement. The terminal device being unable to perform uplink enhancement includes: the terminal device not supporting uplink enhancement, or the first candidate cell not supporting uplink enhancement.

[0016] It should be understood that the cell selection criteria for the terminal device to select a cell include Srxlev>0. The above-mentioned first offset parameter and second offset parameter are both used to determine Srxlev. Among them, the specific way to determine Srxlev using the first offset parameter can be Srxlev=A+N1; the specific way to determine Srxlev using the second offset parameter can be Srxlev=A+N2. A is used to characterize the influence of other factors (such as the measured reference signal received power, etc.) on Srxlev, N1 is the first offset parameter, and N2 is the second offset parameter.

[0017] Since the first offset parameter N1 is greater than the second offset parameter N2, the possibility of A+N1>0 is higher than the possibility of A+N2>0. That is, compared with A+N1>0, the possibility of A+N2>0 is lower. Compared with using the first offset parameter N1 to determine Srxlev, using the second offset parameter N2 to determine Srxlev for cell selection requires a higher A value.

[0018] A key factor affecting the size of the A value is the distance between the terminal device and the network device; the closer the distance, the larger the A value, and the farther the distance, the smaller the A value. With this solution, if the terminal device cannot perform uplink enhancement, the second offset parameter is used to determine Srxlev. At this time, if the terminal device needs to access the cell, it means that a larger A value is required. At this time, the terminal device needs to be closer to the network device. In this way, even if the terminal device cannot perform uplink enhancement, the signal is better because the distance between the terminal device and the network device is closer, which can still ensure normal communication between the terminal device and the network device.

[0019] In combination with the first aspect, in another possible design, the first offset parameter is equal to 0, and the second offset parameter is less than 0; or, the first offset parameter is greater than 0, and the second offset parameter is less than or equal to 0. It should be noted that when the first offset parameter or the second offset parameter is equal to 0, Srxlev is not changed.

[0020] In combination with the first aspect, in another possible design, the first offset includes: a second type of offset, and the second type of offset is used to determine Squal.

[0021] In combination with the first aspect, in another possible design, the first offset may include the second type of offset. The second type of offset may include a third offset parameter and a fourth offset parameter. The third offset parameter and the fourth offset parameter are both used to determine Squal. The third offset parameter is greater than the fourth offset parameter.

[0022] For any first candidate cell of at least one first candidate cell, the terminal device may perform the following steps to determine the Squal of the first candidate cell:

[0023] If the uplink capability information of the terminal device indicates that the terminal device is capable of uplink enhancement, the terminal device can use the third offset parameter in the second type of offset to determine the Squal of the first selected cell; if the uplink capability information of the terminal device indicates that the terminal device is not capable of uplink enhancement, the terminal device can use the fourth offset parameter in the second type of offset to determine the Squal of the first selected cell.

[0024] Among them, the terminal device being able to perform uplink enhancement also includes: the terminal device supports uplink enhancement, and the first selected cell supports uplink enhancement; the terminal device being unable to perform uplink enhancement also includes: the terminal device does not support uplink enhancement, or the first selected cell does not support uplink enhancement.

[0025] It should be understood that the cell selection criteria for the terminal device to perform cell selection include Squal>0. The third offset parameter and the fourth offset parameter are both used to determine Squal. Among them, the specific method of using the third offset parameter to determine Squal can be Squal=B+M1; the specific method of using the fourth offset parameter to determine Squal can be Squal=B+M2. B is used to characterize the impact of other factors (such as reference signal reception quality, etc.) on Squal, M1 is the third offset parameter, and M2 is the fourth offset parameter.

[0026] Since the third offset parameter M1 is greater than the fourth offset parameter M2, the possibility of B+M1>0 is higher than the possibility of B+M2>0. That is, compared with B+M1>0, the possibility of B+M2>0 is lower. Compared with using the third offset parameter M1 to determine Squal, using the fourth offset parameter M2 to determine Squal for cell selection requires a higher A value.

[0027] A key factor affecting the size of the B value is the distance between the terminal device and the network device; the closer the distance, the larger the B value, and the farther the distance, the smaller the B value. With this solution, if the terminal device cannot perform uplink enhancement, the fourth offset parameter is used to determine Squal. At this time, if the terminal device needs to access the cell, it means that a larger B value is required. At this time, the distance between the terminal device and the network device is closer. In this way, even if the terminal device cannot perform uplink enhancement, the signal is better because the distance between the terminal device and the network device is closer, and the normal communication between the terminal device and the network device can still be guaranteed.

[0028] In combination with the first aspect, in another possible design manner, the third offset parameter is equal to 0, and the fourth offset parameter is less than 0; or, the third offset parameter is greater than 0, and the fourth offset parameter is less than or equal to 0.

[0029] In combination with the first aspect, in another possible design, the first offset may include the first type of offset and the second type of offset. The first type of offset may include a first offset parameter and a second offset parameter, both of which are used to determine Srxlev. The second type of offset may include a third offset parameter and a fourth offset parameter, both of which are used to determine Squal. The first offset parameter is greater than the second offset parameter, and the third offset parameter is greater than the fourth offset parameter.

[0030] For any first candidate cell of the at least one first candidate cell, the terminal device may perform the following steps to determine Srxlev and Squal of the first candidate cell:

[0031] If the uplink capability information of the terminal device indicates that the terminal device can perform uplink enhancement, the terminal device uses the first offset parameter in the first type of offset to determine the Srxlev of the first cell to be selected, and uses the third offset parameter in the second type of offset to determine the Squal of the first cell to be selected. If the uplink capability information of the terminal device indicates that the terminal device cannot perform uplink enhancement, if the uplink capability information indicates that the terminal device cannot perform uplink enhancement, the terminal device uses the second offset parameter in the first type of offset to determine the Srxlev of the first cell to be selected, and uses the fourth offset parameter in the second type of offset to determine the Squal of the first cell to be selected.

[0032] In combination with the first aspect, in another possible design manner, the above method also includes: the terminal device can obtain indication information of at least one first selected cell, and the indication information is used to indicate whether the corresponding cell supports uplink enhancement.

[0033] In this way, the terminal device determines whether the terminal device can perform uplink enhancement according to whether the cell supports uplink enhancement. In this way, the terminal device can determine the cell selection parameter according to the uplink capability information by using the appropriate first offset, and then determine the appropriate cell.

[0034] In combination with the first aspect, in another possible design, the method further includes: the terminal device may obtain a second offset of at least one second selected cell, and the second offset is used to determine a cell reselection parameter (including: Srxlev and / or Squal) of at least one second selected cell. Afterwards, the terminal device may determine the cell reselection parameter of at least one second selected cell using the second offset based on the uplink capability information of the terminal device. Then, the terminal device may determine the second cell based on the cell reselection parameter, and the second cell is one of the at least one second selected cell.

[0035] The second selected cells include the first cell and neighboring cells of the first cell.

[0036] Based on the above technical solution, when the terminal device uses the second offset to determine the cell reselection parameters (Srxlev and / or Squal), the uplink capability information of the terminal device is combined. The uplink capability information of the terminal device can indicate whether the terminal device is capable of uplink enhancement. In this way, using this solution, for terminal devices that can perform uplink enhancement, their cell reselection parameters may be different from the cell reselection parameters of terminal devices that cannot perform uplink enhancement. Therefore, in this solution, different cell reselection parameters can be used for cell selection for the above two types of terminal devices to ensure normal communication between the terminal device and the selected cell.

[0037] Moreover, by adopting this scheme, if a terminal device that cannot perform uplink enhancement needs to access the cell, the distance between the terminal device and the network device needs to be closer to meet the cell reselection criteria. In this way, even if the terminal device cannot perform uplink enhancement, the normal communication between the terminal device and the network device can still be guaranteed because the distance between the terminal device and the network device is close and the signal is good. In contrast, for a terminal device that can perform uplink enhancement, the terminal device can meet the cell reselection criteria when the distance between the terminal device and the network device is far, and then reselect to the second cell, making full use of the service resources of the cell. For a terminal device that supports uplink enhancement, when the distance between the terminal device and multiple network devices is the same or similar, it is possible that the terminal device does not meet the cell reselection criteria in the second selected cell that does not support uplink enhancement, but can meet the cell reselection criteria in the second selected cell that supports uplink enhancement, then the terminal device can reselect to the second cell, ensuring the continuity of the communication services between the terminal device and the network device, enhancing the reliability of mobility management, and making full use of the service resources of the cell.

[0038] In combination with the first aspect, in another possible design, the method further includes: the terminal device can obtain a third offset of at least one second selected cell, and the third offset is used to determine the R value of at least one second selected cell. The terminal device can use the third offset to determine the R value of at least one second selected cell based on the uplink capability information of the terminal device. Afterwards, the terminal device can determine the third cell based on the R value, and the third cell is one of the at least one second selected cell. Among them, the R value is a sorting parameter of the sorting criterion. Exemplarily, the terminal device can determine the R value of the first cell based on the third offset of the first cell; and determine the R value of each neighboring cell based on the third offset of each neighboring cell of the first cell. Afterwards, the terminal device can sort the R value of the first cell and the R value of the neighboring cell to determine the third cell.

[0039] Based on the above technical solution, when the terminal device uses the third offset to determine the R value, the uplink capability information of the terminal device is combined. The uplink capability information of the terminal device can indicate whether the terminal device is capable of uplink enhancement. In this way, using this solution, when the terminal device supports uplink enhancement, the method for determining the R value is different for the second selected cell that supports uplink enhancement and the second selected cell that does not support uplink enhancement. And it should be understood that the terminal device can sort the R value of the cell where the terminal device is currently resident and the R value of the neighboring cell. Therefore, in this solution, when sorting the above two types of second selected cells, different R value determination methods are used to ensure normal communication between the terminal device and the selected cell.

[0040] Moreover, with this solution, if a terminal device that cannot perform uplink enhancement needs to access the cell, the distance between the terminal device and the network device needs to be closer to meet the cell reselection criteria. In this way, even if the terminal device cannot perform uplink enhancement, the normal communication between the terminal device and the network device can still be guaranteed because the distance between the terminal device and the network device is closer and the signal is better. For terminal devices that can use uplink enhancement, when the distance between the terminal device and multiple network devices is the same or similar, the cell that supports uplink enhancement is ranked higher using the R criterion than the cell that does not support uplink enhancement, that is, the terminal device is more inclined to reside in the cell that supports uplink enhancement, thereby enhancing the reliability of mobility management and making full use of the service resources of the cell.

[0041] In combination with the first aspect, in another possible design manner, the third offset includes a fifth offset parameter and a sixth offset parameter, and the fifth offset parameter is greater than the sixth offset parameter. For each second to be selected cell in at least one second to be selected cell, the terminal device may perform the following steps to determine the R value of the second to be selected cell:

[0042] If the uplink capability information of the terminal device indicates that the terminal device can perform uplink enhancement, the terminal device can use the fifth offset parameter in the third offset of the second selected cell to determine the R value of the second selected cell. If the uplink capability information of the terminal device indicates that the terminal device cannot perform uplink enhancement, the terminal device can use the sixth offset parameter in the third offset of the second selected cell to determine the R value of the second selected cell.

[0043] Among them, the terminal device is able to perform uplink enhancement includes: the terminal device supports uplink enhancement, and the second selected cell supports uplink enhancement; the terminal device cannot perform uplink enhancement includes: the terminal device does not support uplink enhancement, or the second selected cell does not support uplink enhancement.

[0044] In combination with the first aspect, in another possible design, the fifth offset parameter is equal to 0, and the sixth offset parameter is less than 0. Alternatively, the fifth offset parameter is greater than 0, and the sixth offset parameter is less than or equal to 0.

[0045] In a second aspect, a cell selection device is provided, wherein the cell selection device comprises: an acquisition unit and a determination unit.

[0046] An acquisition unit is used to acquire a first offset of at least one first cell to be selected, the first offset is used to determine a cell selection parameter of at least one first cell to be selected, the cell selection parameter includes: a cell selection reception level value Srxlev and / or a cell selection reception quality value Squal. A determination unit is used to determine the cell selection parameter of at least one first cell to be selected using the first offset according to the uplink capability information of the terminal device; the uplink capability information is used to indicate whether the terminal device is capable of uplink enhancement. The determination unit is also used to determine a first cell according to the cell selection parameter; the first cell is one of the at least one first cell to be selected.

[0047] In combination with the second aspect, in a possible design manner, the first offset includes: a first type of offset, and the first type of offset is used to determine Srxlev.

[0048] In combination with the second aspect, in another possible design manner, for any first to-be-selected cell among the at least one first to-be-selected cell, the determining unit performs the following steps to determine the Srxlev of the first to-be-selected cell:

[0049] If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the first offset parameter in the first type of offset is used to determine the Srxlev of the first selected cell; if the uplink capability information indicates that the terminal device is not capable of uplink enhancement, the second offset parameter in the first type of offset is used to determine the Srxlev of the first selected cell; wherein the first offset parameter is greater than the second offset parameter; the terminal device is capable of uplink enhancement including: the terminal device supports uplink enhancement, and the first selected cell supports uplink enhancement; the terminal device is not capable of uplink enhancement including: the terminal device does not support uplink enhancement, or the first selected cell does not support uplink enhancement.

[0050] In combination with the second aspect, in another possible design manner, the first offset parameter is equal to 0, and the second offset parameter is less than 0; or, the first offset parameter is greater than 0, and the second offset parameter is less than or equal to 0.

[0051] In combination with the second aspect, in another possible design, the first offset includes: a second type of offset, and the second type of offset is used to determine Squal.

[0052] In combination with the second aspect, in another possible design manner, for any first candidate cell of at least one first candidate cell, the determining unit performs the following steps to determine the Squal of the first candidate cell:

[0053] If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the third offset parameter in the second type of offset is used to determine the Squal of the first selected cell; if the uplink capability information indicates that the terminal device is not capable of uplink enhancement, the fourth offset parameter in the second type of offset is used to determine the Squal of the first selected cell; wherein the third offset parameter is greater than the fourth offset parameter; the terminal device is capable of uplink enhancement also includes: the terminal device supports uplink enhancement, and the first selected cell supports uplink enhancement; the terminal device is not capable of uplink enhancement also includes: the terminal device does not support uplink enhancement, or the first selected cell does not support uplink enhancement.

[0054] In combination with the second aspect, in another possible design manner, the third offset parameter is equal to 0, and the fourth offset parameter is less than 0; or, the third offset parameter is greater than 0, and the fourth offset parameter is less than or equal to 0.

[0055] In combination with the second aspect, in another possible design method, the acquisition unit is also used to obtain indication information of at least one first selected cell, and the indication information is used to indicate whether the corresponding cell supports uplink enhancement.

[0056] In combination with the second aspect, in another possible design, the acquisition unit is further used to acquire a second offset of at least one second selected cell, the second offset is used to determine a cell reselection parameter of at least one second selected cell, the cell reselection parameter including: Srxlev and / or Squal. The determination unit is further used to determine the cell reselection parameter of at least one second selected cell using the second offset according to the uplink capability information of the terminal device. The determination unit is further used to determine the second cell according to the cell reselection parameter; the second cell is one of the at least one second selected cell.

[0057] In combination with the second aspect, in another possible design, the acquisition unit is further used to acquire a third offset of at least one second selected cell, and the third offset is used to determine the R value of at least one second selected cell. The determination unit is further used to determine the R value of at least one second selected cell using the third offset according to the uplink capability information of the terminal device. The determination unit is further used to determine a third cell according to the R value, and the third cell is one of the at least one second selected cell.

[0058] In combination with the second aspect, in another possible design manner, for each second to be selected cell in the at least one second to be selected cell, the determining unit performs the following steps to determine the R value of the second to be selected cell:

[0059] If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the fifth offset parameter in the third offset of the second selected cell is used to determine the R value of the second selected cell. If the uplink capability information indicates that the terminal device is not capable of uplink enhancement, the sixth offset parameter in the third offset of the second selected cell is used to determine the R value of the second selected cell. Among them, the fifth offset parameter is greater than the sixth offset parameter; the terminal device is capable of uplink enhancement includes: the terminal device supports uplink enhancement, and the second selected cell supports uplink enhancement; the terminal device is not capable of uplink enhancement includes: the terminal device does not support uplink enhancement, or the second selected cell does not support uplink enhancement.

[0060] In combination with the second aspect, in another possible design manner, the fifth offset parameter is equal to 0, and the sixth offset parameter is less than 0; or, the fifth offset parameter is greater than 0, and the sixth offset parameter is less than or equal to 0.

[0061] In a third aspect, a cell selection device is provided. The cell selection device comprises: a processor, the processor is coupled to a memory, the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory, so that the cell selection device performs the cell selection method as described in any possible implementation of the first aspect.

[0062] In a possible design, the cell selection device described in the third aspect may further include a transceiver. The transceiver may be a transceiver circuit or an input / output port. The transceiver may be used for the cell selection device to communicate with other cell selection devices.

[0063] In the present application, the cell selection device described in the third aspect may be a terminal device or a network device, or a chip (system) or other parts or components arranged inside the terminal device or the network device.

[0064] In addition, the technical effects of the cell selection device described in the third aspect can refer to the technical effects of the cell selection method described in any implementation method of the first aspect, and will not be repeated here.

[0065] In a fourth aspect, a computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are executed on a computer, the computer executes the cell selection method described in any possible implementation manner in the first aspect.

[0066] In a fifth aspect, a computer program product is provided, including a computer program or instructions, which, when executed on a computer, enables the computer to execute the cell selection method described in any possible implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 A schematic diagram of a terminal device starting measurement provided in an embodiment of the present application;

[0068] Figure 2 A schematic diagram of a cell reselection description provided in an embodiment of the present application;

[0069] Figure 3 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0070] Figure 4 A schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0071] Figure 5 A flowchart of a method for selecting a cell provided in an embodiment of the present application;

[0072] Figure 6 A schematic diagram of a method for determining uplink capability information provided in an embodiment of the present application;

[0073] Figure 7 A schematic diagram of a flow chart of another method for selecting a cell provided in an embodiment of the present application;

[0074] Figure 8A flowchart of another method for determining uplink capability information provided in an embodiment of the present application;

[0075] Fig. 9 A schematic diagram of a flow chart of another method for selecting a cell provided in an embodiment of the present application;

[0076] Fig.10 A schematic diagram of the structure of a cell selection device provided in an embodiment of the present application;

[0077] Fig.11 A schematic diagram of the structure of another cell selection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0078] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0079] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless fidelity (WiFi) systems, vehicle to everything (V2X) communication systems, device-to-device (D2D) communication systems, Internet of Vehicles communication systems, 4th generation (4G) mobile communication systems, such as long term evolution (LTE) systems, worldwide interoperability for microwave access (WiMAX) communication systems, fifth generation (5G) mobile communication systems, such as new radio (NR) systems, and future communication systems, such as sixth generation (6G) mobile communication systems.

[0080] The present application will present various aspects, embodiments or features around a system that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. In addition, combinations of these schemes may also be used.

[0081] In addition, in the embodiments of the present application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0082] In the embodiments of the present application, "information", "signal", "message", "channel" and "signaling" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings they intend to express are consistent. "of", "corresponding, relevant" and "corresponding" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings they intend to express are consistent.

[0083] In the embodiments of the present application, sometimes a subscript such as W1 may be mistakenly written as a non-subscript such as W1. When the difference is not emphasized, the meanings to be expressed are consistent.

[0084] In order to facilitate understanding of the technical solution of the present application, before introducing in detail a method for selecting a cell in an embodiment of the present application, conventional technology is first introduced.

[0085] Conventional technology 1: cell selection criterion (also called S criterion).

[0086] In a cellular communication system, when a terminal device is turned on, it can select a suitable cell from at least one cell to access. After the terminal device selects a suitable cell, it can communicate wirelessly with the suitable cell. Specifically, when the terminal device selects a cell, it needs to measure each cell in at least one cell to obtain a measurement result corresponding to each cell. Afterwards, the terminal device can select a suitable cell from at least one cell to access based on the measurement result of each cell.

[0087] Exemplarily, the terminal device may determine whether a cell is a suitable cell by a cell selection criterion (also referred to as an S criterion). If the measurement result of the cell satisfies the following conditions, the terminal device determines that the cell satisfies the S criterion.

[0088] Condition 1: cell selection reception level value Srxlev>0 and cell selection reception quality value Squal>0.

[0089] Among them, Srxlev and Squal can satisfy the following formulas respectively:

[0090] Srxlev=Q rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–P compensation –Q offsettemp Formula 1.

[0091] Among them, Srxlev represents the cell selection receiving level value, Q rxlevmeasrepresents the reference signal received power, Q rxlevmin Indicates the minimum signal receiving power, Q rxlevminoffset Indicates Q rxlevmin The offset, P compensation Indicates the power compensation value, Q offsettemp represents the offset, and N represents the first type of offset mentioned above.

[0092] Squal=Q qualmeas –(Q qualmin +Q qualminoffset )–Q offsettemp Formula 2.

[0093] Among them, Squal represents the cell selection reception quality value, Q qualmeas Indicates the reference signal reception quality, Q qualmin Indicates the minimum reference signal reception quality, Q qualminoffset Indicates Q qualmin The offset, Q offsettemp represents the offset, and M represents the second type of offset mentioned above.

[0094] According to condition 1 and formula 1, Q rxlevmeas >(Q rxlevmin +Q rxlevminoffset )+P compensation +Q offsettemp , according to condition 1 and formula 2, Q qualmeas >(Q qualmin +Q qualminoffset )–Q offsettemp That is, when Qrxlevmeas is greater than the value given by the above parameters (Q rxlevmin , Q rxlevminoffset , P compensation , Q offsettemp ) determines the threshold (which can be referred to as the power threshold), and Q qualmeas Greater than the above parameters (Q qualmin , Q qualminoffset , Q offsettemp ) determines a threshold (which may be referred to as a quality threshold for short), the cell may be considered to meet the S criterion.

[0095] Conventional technology 2: Coverage recovery.

[0096] Coverage recovery (also called uplink enhancement) can improve the uplink transmission power of terminal devices, that is, the terminal device can improve the uplink transmission power of the terminal device through a series of physical uplink shared channel (PUSCH) coverage recovery technologies. Coverage recovery capability (also called uplink enhancement capability) is an optional capability possessed by terminal devices and network devices. In other words, terminal devices and network devices may or may not support uplink enhancement. When both the terminal device and the network device support uplink enhancement, uplink enhancement can improve the uplink transmission power of the terminal device. When the terminal device or the network device does not support uplink enhancement, the terminal device still cannot increase the uplink transmission power.

[0097] Among them, the uplink enhancement technology includes: uplink transmission bundling technology;

[0098] Channel estimation technology: cross-slot channel estimation technology, cross-repetition channel estimation technology;

[0099] Lower DM-RS density in time domain;

[0100] Repetition: PUSCH repetition enhancements (enhancements on PUSCH repetition) technology (e.g., Class A PUSCH repetition enhancement, Class B PUSCH repetition enhancement); MSG3 initial transmission repetition, MSG3 retransmission repetition;

[0101] Frequency hopping across a larger system bandwidth technology, BWP switching across a larger system bandwidth technology.

[0102] Conventional technology three: cell reselection. Cell reselection can be divided into the following three steps.

[0103] Step 1: The terminal device can start measuring the current serving cell (also referred to as the first cell) and neighboring cells (including same-frequency cells, different-frequency cells, and different-system cells) according to the threshold. For example, please refer to Figure 1 , is a schematic diagram of a terminal device starting measurement provided in an embodiment of the present application. Figure 1For the introduction, reference can be made to the existing conventional technology, which will not be described in detail here.

[0104] Step 2: The terminal device determines whether the signal of the neighboring cell meets the reselection criteria.

[0105] refer to Figure 2 , is a schematic diagram of a cell reselection provided in an embodiment of the present application. Figure 2 As shown, when the cell reselection is a high priority reselection, and the system message (System Information Block (SIB) 2) includes the serving cell quality threshold threshServingLowQ, if the neighboring cell quality Squal> the high priority reselection quality threshold threshX,HighQ, the continuous reselection time parameter treselectionRAT, and the terminal device has been resident in the first cell for more than T time (for example, the prior art is set to 1 second), the terminal device determines that the signal of the neighboring cell meets the reselection standard. Alternatively, when the cell reselection is a high priority reselection, and the system message (SIB2) does not include threshServingLowQ, if the neighboring cell level Srxlev> the high priority reselection power threshold threshX,HighP, the continuous treselectionRAT, and the terminal device has been resident in the first cell for more than T time (for example, the prior art is set to 1 second), the terminal device determines that the signal of the neighboring cell meets the reselection standard.

[0106] When the cell reselection is the same priority reselection, the terminal device can rank the first cell and the neighboring cell by the cell ranking criterion (R criterion). If the ranking parameter (herein referred to as R value) used for the ranking criterion of the neighboring cell is ranked higher than the R value of the first cell, and lasts for treselectionRAT, and the terminal device has been stationed in the first cell for more than T time (for example, the prior art is set to 1 second), the terminal device determines that the signal of the neighboring cell meets the reselection criterion.

[0107] Specifically, the R value of the first cell may satisfy the following formula:

[0108] R s =Q meas,s +Q hyst –Q offsettemp Formula three.

[0109] Among them, R s represents the R value of the first cell, Q meas,s Indicates the reference signal receiving power (RSRP) measurement used for cell reselection, Q hyst represents the hysteresis factor of the sorting criterion, Q offsettemp Indicates the offset.

[0110] The R value of the neighboring cell can satisfy the following formula:

[0111] R n = Q meas,n – Q offset – Q offsettemp Formula Four.

[0112] Wherein, R n represents the R value of the neighboring cell, Q meas,s represents the RSRP measurement quantity for cell reselection, Q offset represents the sorting criterion hysteresis factor, Q offsettemp represents the offset.

[0113] When the cell reselection is a low-priority reselection and the system message (SIB2) includes threshServingLowQ, during the treselectionRAT period, if the first cell satisfies Squal < threshServing,LowQ, the low-priority frequency satisfies Squal > the low-priority reselection quality threshold threshX,LowQ, and the terminal device has stayed in the first cell for more than T time (for example, set to 1 second in the prior art), the terminal device determines that the signal of the neighboring cell meets the reselection criteria. Or, when the cell reselection is a low-priority reselection and the system message (SIB2) does not include threshServingLowQ, during the treselectionRAT period, if the first cell satisfies Srxlev < the serving cell power threshold threshServing,LowP, the low-priority frequency satisfies Srxlev > the low-priority reselection power threshold threshX,LowP, and the terminal device has stayed in the first cell for more than T time (for example, set to 1 second in the prior art), the terminal device determines that the signal of the neighboring cell meets the reselection criteria.

[0114] Step Three: If there is a cell that meets the reselection criteria (which can be called the second cell), the terminal device starts reselection, receives the system message of the second cell (such as a non-access restricted message), and camps on the second cell. If there is no cell that meets the reselection criteria, the terminal device still camps on the first cell.

[0115] Massive Machine Type Communication (mMTC) has the characteristics of low power consumption, low latency, and high reliability. In mMTC services, terminal devices are not only widely distributed and numerous, but also have low power consumption and low cost. For example, terminal devices in mMTC services (which can be called REDCAP terminal devices) can reduce the power consumption and cost of terminal devices by reducing the number of antennas in the terminal devices. However, this will result in a reduction in the uplink transmission power of REDCAP terminal devices.

[0116] At present, the terminal device can improve the uplink transmission power of the terminal device through uplink enhancement (also known as coverage recovery), so that the terminal device can wirelessly communicate with the cell within the coverage range of the cell. However, since some terminal devices cannot perform uplink enhancement, when performing cell selection, the terminal devices that can perform uplink enhancement and the terminal devices that cannot perform uplink enhancement both select cells according to the same S criterion (or reselect cells according to the R criterion), which may cause some terminal devices to be unable to wirelessly communicate with the selected cell.

[0117] For example, please refer to Figure 3 , is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. Figure 3 As shown, the communication system includes a network device and at least one terminal device. For example, the network device includes a base station A, and the at least one terminal device includes a terminal device 1 and a terminal device 2. Among them, terminal device 1 and terminal device 2 are both REDCAP terminal devices; terminal device 1 can perform uplink enhancement, and terminal device 2 cannot perform uplink enhancement. Terminal device 1 and terminal device 2 are both located within the downlink coverage range of base station A; that is, terminal device 1 and terminal device 2 both meet the S criterion (that is, the reference signal reception power of terminal device 1 and terminal device 2 are both greater than the power threshold, and the reference signal reception quality is both greater than the quality threshold). The uplink coverage range of terminal device 1 is uplink coverage range A, and the uplink coverage range of terminal device 2 is uplink coverage range B. By Figure 2 It can be seen that terminal device 1 meets the S criterion; and terminal device 1 can perform uplink enhancement, that is, the uplink transmission power of terminal device 1 is relatively high, and terminal device 1 can wirelessly communicate with base station A. Although terminal device 2 meets the S criterion; however, since the uplink transmission power of terminal device 2 is relatively low (that is, the uplink coverage range B is relatively small), terminal device 2 cannot wirelessly communicate with base station A.

[0118] In addition, the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0119] To facilitate understanding of the embodiments of the present application, first Figure 4 The communication system shown in the example is used to describe in detail the communication system applicable to the embodiment of the present application. Figure 4 A schematic diagram of the architecture of a communication system applicable to the cell selection method provided in an embodiment of the present application.

[0120] like Figure 4 As shown, the communication system includes network equipment and terminal equipment. For example, the network equipment includes base station B, and the terminal equipment includes terminal equipment 3 and terminal equipment 4.

[0121] The network device is located at the network side of the communication system and has a wireless transceiver function or is a chip or chip system that can be set in the device. The network device includes, but is not limited to: an access point (AP) in a wireless fidelity (WiFi) system, such as a home gateway, a router, a server, a switch, a bridge, etc., an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved NodeB, or homeNode B, HNB), a baseband unit (BBU), a wireless relay node, a wireless backhaul node, a transmission point (TRP or TP), etc., and can also be 5G, such as a gNB in ​​a new radio (NR) system, or a transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DBU). unit (DU), road side unit (RSU) with base station function, etc.

[0122] The terminal device is a terminal that accesses the communication system and has a wireless transceiver function or a chip or chip system that can be set in the terminal. The terminal device can also be called a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal UE, a terminal, a wireless communication device, a user agent or a user device. The terminal device in the embodiment of the present application can be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (selfdriving), a wireless terminal in telemedicine (remote medical), a wireless terminal in smart grid (smartgrid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in a smart city (smartcity), a wireless terminal in a smart home (smart home), a vehicle-mounted terminal, an RSU with a terminal function, etc. The terminal device of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit that is built into the vehicle as one or more components or units. The vehicle can implement the cell selection method provided in the present application through the built-in vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit.

[0123] It should be noted that the cell selection method provided in the embodiment of the present application can be applied to Figure 4 The communication between the terminal device and the network device shown in the figure can be specifically implemented by referring to the following method embodiment, which will not be described in detail here.

[0124] It should be pointed out that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of corresponding functions in other communication systems.

[0125] It should be understood that Figure 4 This is a simplified schematic diagram for ease of understanding only. The communication system may also include other network devices and / or other terminal devices. Figure 4 Not drawn in.

[0126] The following will be combined Figure 5-Figure 9 The cell selection method provided in the embodiment of the present application is described in detail.

[0127] For example, Figure 5A flowchart of a method for selecting a cell provided in an embodiment of the present application. The method for selecting a cell may be applicable to Figure 4 The communication between the terminal device and the network device shown in FIG. Figure 5 As shown, the cell selection method includes the following steps:

[0128] S501. A terminal device obtains a first offset of at least one first cell to be selected.

[0129] The first offset is used to determine at least one cell selection parameter of a first selected cell, and the cell selection parameter includes: a cell selection reception level value Srxlev and / or a cell selection reception quality value Squal. That is, the terminal can determine Srxlev and / or Squal of the first selected cell according to the first offset of the first selected cell.

[0130] In the embodiment of the present application, the first offset includes a first-type offset and / or a second-type offset, wherein the first-type offset is used to determine Srxlev, and the second-type offset is used to determine Squal.

[0131] It should be noted that both the first type of offset and the second type of offset may include one or more offset parameters. That is, the first offset may include one or more offset parameters.

[0132] In one possible design, the first offset includes a first type of offset, and the first type of offset includes one or more offset parameters. For example, the first type of offset of the selected cell A includes adjustValue1, and adjustValue1 can be used to determine the Srxlev of the selected cell A. For another example, the first type of offset of the selected cell A includes adjustValue1 and adjustValue2, and adjustValue1 and adjustValue2 can be used to determine the Srxlev of the selected cell A.

[0133] In another possible design, the first offset includes a second type of offset, and the second type of offset includes one or more offset parameters. For example, the second type of offset of the selected cell A includes adjustValue1, and adjustValue1 can be used to determine the Squal of the selected cell A. For another example, the second type of offset of the selected cell A includes adjustValue1 and adjustValue2, and adjustValue1 and adjustValue2 can be used to determine the Squal of the selected cell A.

[0134] In another possible design, the first offset includes a first type of offset and a second type of offset, and the first type of offset and the second type of offset both include one or more offset parameters. For example, the first type of offset of the selected cell A includes adjustValue1, and the second type of offset includes adjustValue2; adjustValue1 can be used to determine the Srxlev of the selected cell A, and adjustValue2 can be used to determine the Squal of the selected cell A. For another example, the first type of offset of the selected cell A includes adjustValue1 and adjustValue2, and the second type of offset includes adjustValue3; adjustValue1 and adjustValue2 can be used to determine the Srxlev of the selected cell A, and adjustValue3 can be used to determine the Squal of the selected cell A.

[0135] It should be noted that the first offset can represent a power value, a level value, a quality value, etc., which is not limited in the embodiments of the present application. In addition, the offset parameter included in the first offset can be a positive number, 0, or a negative number. For example, the first offset includes 1 decibel relative to one milliwatt (dBm); for another example, the first offset includes 0dBm and -3dBm; for another example, the first offset includes 3dBm and -5dBm.

[0136] In a possible implementation, a network device may broadcast adjustment information of a cell corresponding to the network device, and the adjustment information includes a first offset. A terminal device may receive the adjustment information from the network device and obtain the first offset of the cell. The adjustment information may be located in the system information. For example, the adjustment information may be located in a master information block (MIB), SIB1, or SIB2. For example, the adjustment information may be located in the cellSelectionInfo field in SIB1.

[0137] S502: The terminal device determines a cell selection parameter of at least one first to-be-selected cell using a first offset according to the uplink capability information of the terminal device.

[0138] Among them, the uplink capability information is used to indicate whether the terminal device is capable of uplink enhancement.

[0139] It should be noted that whether the terminal device can perform uplink enhancement is related to whether the terminal device and the cell support uplink enhancement. If the terminal device supports uplink enhancement and the cell supports uplink enhancement, the terminal device can perform uplink enhancement. If the terminal device does not support uplink enhancement and / or the cell does not support uplink enhancement, the terminal device cannot perform uplink enhancement. In other words, the inability of the terminal device to perform uplink enhancement can be divided into the following three situations.

[0140] Case 1: If the terminal device does not support uplink enhancement, but the cell supports uplink enhancement, the terminal device cannot perform uplink enhancement. Case 2: If the terminal device supports uplink enhancement, but the cell does not support uplink enhancement, the terminal device cannot perform uplink enhancement. Case 3: If the terminal device does not support uplink enhancement, but the cell does not support uplink enhancement, the terminal device cannot perform uplink enhancement. It should be noted that for the specific introduction of the process by which the terminal device determines whether the terminal device can perform uplink enhancement, please refer to S601-S604, which will not be repeated here.

[0141] In a possible implementation, the first offset includes a first type of offset, and the first type of offset is used to determine Srxlev. The terminal device determines the Srxlev of the first candidate cell using the first type of offset according to the uplink capability information of the terminal device.

[0142] Among them, Srxlev can satisfy the following formula:

[0143] Srxlev=Q rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–P compensation –Q offsettemp +N Formula Five.

[0144] Among them, Srxlev represents the cell selection receiving level value, Q rxlevmeas represents the reference signal received power, Q rxlevmin Indicates the minimum signal receiving power, Q rxlevminoffset Indicates Q rxlevmin The offset, P compensation Indicates the power compensation value, Q offsettemp represents the offset, and N represents the first type of offset mentioned above.

[0145] Combining condition 1, formula 2 and formula 5, we can get condition 2:

[0146] Q rxlevmeas >(Q rxlevmin +Q rxlevminoffset )+P compensation +Q offsettemp -N condition two 1;

[0147] Qqualmeas >(Q qualmin +Q qualminoffset )–Q offsettemp Condition two 2.

[0148] Among them, condition 2 includes condition 2 1 and condition 2 2.

[0149] In some embodiments, the first type of offset includes a first offset parameter and a second offset parameter. If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the terminal device uses the first offset parameter in the first type of offset to determine the Srxlev of the first selected cell. If the uplink capability information indicates that the terminal device is not capable of uplink enhancement, the terminal device uses the second offset parameter in the first type of offset to determine the Srxlev of the first selected cell.

[0150] The first offset parameter is greater than the second offset parameter. That is, the power threshold when the terminal device can perform uplink enhancement is less than the power threshold when the terminal device cannot perform uplink enhancement.

[0151] It should be noted that the larger the power threshold, the higher the Q rxlevmeas Condition 2 can only be met when the power threshold is large (i.e. the terminal device is close to the network device and the downlink reference signal received power measurement value is large). Therefore, when the terminal device cannot perform uplink enhancement (i.e. the uplink transmit power of the terminal device is low), the larger the power threshold, the terminal device can only be as close to the network device as possible, that is, as close to the coverage center as possible (i.e. increase Q rxlevmeas ) to ensure Q rxlevmeas This ensures that terminal devices with lower uplink transmission power can still communicate wirelessly with network devices.

[0152] The smaller the power threshold, the higher the Q rxlevmeas In the case of a smaller value (i.e., the terminal device is far away from the network device), condition 2 can be met. Therefore, when the terminal device can perform uplink enhancement (i.e., the uplink transmission power of the terminal device is large), the smaller the power threshold, the farther the terminal device is from the network device (i.e., the lower the Q rxlevmeas ), Q rxlevmeas In this way, the terminal device can more accurately determine the uplink and downlink coverage of the network device, which not only ensures the normal communication between the terminal device and the network device, but also makes full use of the service resources of the cell and avoids the waste of cell resources.

[0153] In a possible design, the first offset parameter is equal to 0, and the second offset parameter is less than 0. The first offset parameter is equal to 0, that is, Formula 4 is the same as Formula 1. In other words, Srxlev is not changed.

[0154] It is understandable that when a terminal device (such as a REDCAP terminal) is capable of uplink enhancement, the uplink transmission power of the REDCAP terminal after uplink enhancement may be the same as the uplink transmission power of a terminal whose capability is not reduced (which can be called a normal terminal device). Therefore, when the terminal device meets condition 1 (i.e., the conventional S criterion), it can communicate wirelessly with the network device.

[0155] If the first offset parameter is less than 0 (the first offset parameter is a negative number), it means that the power threshold is increased (or the measured value Q used to determine the S criterion is reduced). rxlevmeas ). In this way, when the terminal device (such as REDCAP terminal) cannot perform uplink enhancement, the power threshold that the REDCAP terminal needs to meet is higher, and the REDCAP terminal needs to be close to the network device to meet condition 4. This ensures that the terminal device with lower uplink transmission power can still communicate wirelessly with the network device.

[0156] In another possible design, the first offset parameter is greater than 0, and the first offset parameter is less than or equal to 0.

[0157] It should be noted that if the first offset parameter is greater than 0 (the first offset parameter is a positive number), it means that the power threshold is lowered (or the measurement value Q used to determine the S criterion is increased). rxlevmeas ). In this way, when the terminal device can perform uplink enhancement, the power threshold that the terminal device needs to meet is lower, and the terminal device can meet condition 4 when it is far away from the network device. In this way, the service resources of the cell can be fully utilized to avoid wasting cell resources.

[0158] When the first offset parameter is less than 0, it means that the power threshold is increased (or the measured value Q used to judge the S criterion is reduced). rxlevmeas ). For example, when the REDCAP terminal cannot perform uplink enhancement, the power threshold that the REDCAP terminal needs to meet is higher, and the REDCAP terminal needs to be close to the network device to meet condition four. In this way, even if the uplink transmission power of the REDCAP terminal is low, the REDCAP terminal can still communicate wirelessly with the network device. When the first offset parameter is equal to 0, formula four is the same as formula one. In other words, Srxlev is not changed. For example, when an ordinary terminal device cannot perform uplink enhancement, the terminal device can communicate wirelessly with the network device when condition one (that is, the conventional S criterion) is met.

[0159] In addition, the size of the first type of offset is related to the size of the uplink transmission power of the terminal device. In other words, the power threshold (or Q rxlevmeas ) is related to the uplink transmission power of the terminal device.

[0160] Example 1: Due to different uplink enhancement technologies, the uplink transmission power of the terminal is increased to different extents. Different uplink enhancement technologies correspond to different first offset parameters.

[0161] For example, please refer to Table 1, which shows the correspondence between the uplink enhancement technology and the first offset parameter, wherein the enhancement capability of uplink transmission bundling < the enhancement capability of uplink transmission repetition < the enhancement capability of uplink transmission bundling + uplink transmission repetition.

[0162] Table 1

[0163] Uplink Enhancement Technology First offset parameter Uplink Send Bundle The first offset parameter A Uplink transmission repetition The first offset parameter B Uplink transmission bundling + uplink transmission duplication The first offset parameter C

[0164] That is, if the REDCAP terminal applies uplink transmission bundling for uplink enhancement, the first offset parameter is the first offset parameter A. If the REDCAP terminal applies uplink transmission repetition for uplink enhancement, the first offset parameter is the first offset parameter B. If the REDCAP terminal applies uplink transmission bundling + uplink transmission repetition for uplink enhancement, the first offset parameter is the first offset parameter C. Among them, the first offset parameter A is less than 0 (negative number), the first offset parameter B is equal to 0, and the first offset parameter C is greater than 0 (positive number).

[0165] It should be noted that the uplink transmission power of the REDCAP terminal after uplink enhancement by uplink transmission bundling is still lower than the uplink transmission power of the ordinary terminal device; therefore, the first offset parameter is a negative number to increase the power threshold (or reduce Q rxlevmeas ), so that the REDCAP terminal application is close to the network device when sending the bundle uplink, and the second condition can be met, thereby ensuring that the REDCAP terminal application can communicate wirelessly with the terminal device when sending the bundle uplink.

[0166] The uplink transmission power of the REDCAP terminal after repeated uplink enhancement is equal to the uplink transmission power of the ordinary terminal device; therefore, the first offset parameter is equal to 0, and the power threshold (or Q rxlevmeas ).

[0167] The uplink transmission power of the REDCAP terminal after applying uplink transmission bundling + uplink transmission repeated uplink enhancement is greater than the uplink transmission power of the ordinary terminal device; therefore, the first offset parameter is a positive number to reduce the power threshold (or increase Q rxlevmeas ), so that the REDCAP terminal can meet condition 2 even when it is far away from the network device when applying uplink transmission bundling + uplink transmission duplication.

[0168] Example 2: Due to different application scenarios or hardware configurations of different REDCAP terminals (e.g., different numbers of transmitting antennas), the reduction degree of uplink transmit power of different REDCAP terminals is different. Therefore, if the REDCAP terminal cannot perform uplink enhancement, different reduction degrees of uplink transmit power correspond to different second offset parameters.

[0169] For example, please refer to Table 2, which shows the corresponding relationship between the number of transmitting antennas / antenna capabilities and the second offset parameter.

[0170] Table 2

[0171] Number of transmit antennas / antenna capacity Second offset parameter A1 The second offset parameter A A2 The second offset parameter B

[0172] That is, when the number of transmitting antennas / antenna capability of the REDCAP terminal is A1, the second offset parameter is the second offset parameter A. When the number of transmitting antennas / antenna capability of the REDCAP terminal is A2, the second offset parameter is the second offset parameter B.

[0173] Wherein, A1 and A2 are both positive integers, A1 is greater than A2, and the second offset parameter A is greater than the second offset parameter B. For example, the second offset parameter A is -3, and the second offset parameter B is -5.

[0174] It is understandable that REDCAP terminal 1 with the number of transmitting antennas / antenna capacity of A1 and REDCAP terminal 2 with the number of transmitting antennas / antenna capacity of A2 cannot perform uplink enhancement. Since A1 is greater than A2; therefore, the uplink transmission power of REDCAP terminal 1 is greater than the uplink transmission power of REDCAP terminal 2; therefore, the power threshold of REDCAP terminal 1 is lower, and the power threshold of REDCAP terminal 2 is higher (that is, REDCAP terminal 2 is closer to the network device than REDCAP terminal 1). In this way, it can be guaranteed that REDCAP terminal 2 can communicate wirelessly with the network device.

[0175] Alternatively, Srxlev can satisfy the following formula:

[0176] Srxlev=Q rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–max(P EMAX1 –P PowerClass –N,0)–Q offsettemp Formula six.

[0177] Among them, P EMAX1 Indicates the maximum uplink transmission power of the cell, P PowerClass Indicates the maximum output power of the terminal device, and N indicates the first type of offset.

[0178] It should be noted that for the introduction of the first type of offset in Formula 6, and the introduction of the conditions obtained by combining Formula 6 with Conditions 1 and 2, reference can be made to the introduction combined with Formula 5 above, and will not be repeated here.

[0179] In another possible implementation, the first offset includes a second type of offset, and the second type of offset is used to determine Squal. The terminal device determines the Squal of the first candidate cell using the second type of offset according to the uplink capability information of the terminal device.

[0180] Among them, Squal can satisfy the following formula:

[0181] Squal=Q qualmeas –(Q qualmin +Q qualminoffset )-Q offsettemp +M Formula Seven.

[0182] Among them, Squal represents the cell selection reception quality value, Q qualmeas Indicates the reference signal reception quality, Q qualmin Indicates the minimum reference signal reception quality, Q qualminoffset Indicates Q qualmin The offset, Q offsettemp represents the offset, and M represents the second type of offset mentioned above.

[0183] Combining condition 1, formula 1 and formula 7, we can get condition 3:

[0184] Q rxlevmeas >(Q rxlevmin +Q rxlevminoffset )+P compensation +Q offsettemp Condition three 1;

[0185] Q qualmeas >(Q qualmin +Q qualminoffset )–Q offsettemp -M condition three 2.

[0186] Among them, condition three includes the above-mentioned condition three 1 and condition three 2.

[0187] In some embodiments, the second type of offset includes a third offset parameter and a fourth offset parameter. If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the terminal device uses the third offset parameter in the second type of offset to determine the Squal of the first selected cell. If the uplink capability information indicates that the terminal device is not capable of uplink enhancement, the terminal device uses the fourth offset parameter in the second type of offset to determine the Squal of the first selected cell.

[0188] The third offset parameter is greater than the fourth offset parameter. That is, the quality threshold when the terminal device is capable of uplink enhancement is less than the quality threshold when the terminal device is not capable of uplink enhancement.

[0189] It is understandable that the larger the quality threshold, the higher the Q qualmeas Condition 3 can only be met when the quality threshold is large (i.e. the terminal device is close to the network device). Therefore, when the terminal device cannot perform uplink enhancement (i.e. the uplink transmission power of the terminal device is low), the larger the quality threshold, the terminal device can only be as close to the network device as possible (i.e. increase the Q qualmeas ) to ensure Q qualmeas In this way, even if the uplink transmission power of the terminal device is low, the terminal device can still communicate wirelessly with the network device.

[0190] The smaller the quality threshold, the higher the Q qualmeas In the case of a smaller value (i.e., the terminal device is far away from the network device), condition three can be met. Therefore, when the terminal device can perform uplink enhancement (i.e., the uplink transmission power of the terminal device is large), the smaller the quality threshold, the farther the terminal device is from the network device (i.e., the lower the Q qualmeas ), Q qualmeas In this way, the service resources of the cell can be fully utilized to avoid wasting the cell resources.

[0191] In one possible design, the third offset parameter is equal to 0, and the fourth offset parameter is less than 0. In another possible design, the third offset parameter is greater than 0, and the fourth offset parameter is less than or equal to 0.

[0192] It should be noted that, for the specific introduction to the second type of offset, reference can be made to the above introduction to the first type of offset, which will not be repeated here.

[0193] In another possible implementation, the first offset includes a first type offset and a second type offset. The terminal device determines the Srxlev of the first candidate cell using the first type offset and determines the Squal of the first candidate cell using the second type offset according to the uplink capability information of the terminal device.

[0194] Among them, Srxlev can satisfy the above formula 5, and Squal can satisfy the above formula 7.

[0195] Combining condition 1, formula 5 and formula 7, we can get condition 4:

[0196] Q rxlevmeas >(Q rxlevmin +Q rxlevminoffset )+P compensation +Q offsettemp -N Condition four 1.

[0197] Q qualmeas >(Q qualmin +Q qualminoffset )–Q offsettemp -M Condition 4 2.

[0198] Among them, condition four includes condition four 1 and condition four 2.

[0199] It should be noted that for the introduction of the above parameters, reference can be made to the introduction of Formula 5 and Formula 7, which will not be repeated here. For the introduction of the first type of offset and the second type of offset in Condition 4, reference can be made to the introduction of the first type of offset and the second type of offset, which will not be repeated here.

[0200] S503. The terminal device determines the first cell according to the cell selection parameters.

[0201] The first cell is one of at least one first cell to be selected.

[0202] In a possible implementation manner, the terminal device may determine the first cell according to Srxlev in the above formula 5 and Squal in formula 2. That is, the first cell satisfies the above condition 2.

[0203] In another possible implementation, the terminal device may determine the first cell according to Srxlev in the above formula 1 and Squal in formula 7. That is, the first cell satisfies the above condition 3.

[0204] In another possible implementation, the terminal device may determine the first cell according to Srxlev in the above formula 5 and Squal in formula 7. That is, the first cell satisfies the above condition 4.

[0205] Based on the above technical solution, when the terminal device uses the first offset to determine the cell selection parameters (Srxlev and / or Squal), the uplink capability information of the terminal device is combined. The uplink capability information of the terminal device can indicate whether the terminal device is capable of uplink enhancement. In this way, using this solution, for terminal devices that can perform uplink enhancement, their cell selection parameters may be different from those of terminal devices that cannot perform uplink enhancement. Therefore, in this solution, different cell selection parameters can be used for cell selection for the above two types of terminal devices to ensure normal communication between the terminal device and the selected cell.

[0206] The following describes the process by which a terminal device determines whether it is capable of uplink enhancement. Figure 6 , is a flow chart of a method for determining uplink capability information provided in an embodiment of the present application. Figure 6As shown, the method for determining the uplink capability information includes:

[0207] S601. The terminal device determines whether the first selected cell supports uplink enhancement.

[0208] In a possible implementation, the terminal device may obtain indication information of the first candidate cell, where the indication information is used to indicate whether the first candidate cell supports uplink enhancement. The terminal device determines whether the first candidate cell supports uplink enhancement according to the indication information.

[0209] The indication information may be located in the system information, for example, the indication information may be located in the MIB, SIB1, or SIB2. Exemplarily, the network device may broadcast the system information. Afterwards, the terminal device may receive the system information from the network device, obtain the indication information, and determine whether the first selected cell supports uplink enhancement. For example, the indication information includes 0 and 1. When the indication information is 0, it is used to indicate that the first selected cell does not support uplink enhancement; when the indication information is 1, it is used to indicate that the first selected cell supports uplink enhancement.

[0210] Another possible implementation manner is to add an indication field in the cell information of the first candidate cell, the indication field being used to indicate whether the corresponding cell supports uplink enhancement. The terminal determines whether the first candidate cell supports uplink enhancement according to the indication field in the cell information.

[0211] Another possible implementation manner may be to indicate whether the corresponding cell supports uplink enhancement by an implicit indication method. For example, when the system information includes the first offset, it is determined that the first candidate cell supports uplink enhancement.

[0212] Another possible implementation manner is to agree on the correspondence between the frequency information of the cell and whether the cell supports uplink enhancement through a protocol; the terminal device can determine whether the first candidate cell supports uplink enhancement according to the protocol. Exemplarily, the terminal device can obtain the frequency information of the first candidate cell and determine whether the first candidate cell supports uplink enhancement through a protocol.

[0213] For example, please refer to Table 3, which shows the correspondence between the frequency information of a cell and whether the cell supports uplink enhancement, wherein 1 indicates that the cell supports uplink enhancement, and 0 indicates that the cell does not support uplink enhancement.

[0214] Table 3

[0215] Frequency information of the cell Does the cell support uplink enhancement? 1880 MHz (Mega Hertz)–1920 MHz 1 2300MHz–2400MHz 0 2570MHz-2620MHz 1

[0216] That is, when the frequency information of the cell is 1880MHz–1920MHz, the cell supports uplink enhancement. When the frequency information of the cell is 2300MHz–2400MHz, the cell does not support uplink enhancement. When the frequency information of the cell is 2570MHz-2620MHz, the cell supports uplink enhancement.

[0217] In one possible design, if the terminal device determines that the first selected cell supports uplink enhancement, the terminal device executes S602; if the terminal device determines that the first selected cell does not support uplink enhancement, the terminal device executes S603.

[0218] It should be noted that if the first selected cell supports uplink enhancement as an optional feature (i.e., the first selected cell may support uplink enhancement or may not support uplink enhancement), the terminal device needs to determine whether the first selected cell supports uplink enhancement (execute S601). If the first selected cell supports uplink enhancement as a mandatory feature (i.e., the terminal device assumes that the first selected cell supports uplink enhancement by default), the terminal device does not need to determine whether the first selected cell supports uplink enhancement (does not execute S601).

[0219] S602: The terminal device determines whether the terminal device supports uplink enhancement.

[0220] It should be noted that whether the terminal device supports uplink enhancement is related to the hardware device and configuration information of the terminal device. The terminal device can obtain information on whether the terminal device supports uplink enhancement. For example, the terminal device determines based on UE type information (for example, REDCAP UE or MTC UE), and / or registration information in the SIM card, and / or configuration information of the software version, and / or configuration information set by the user.

[0221] In one possible design, if the terminal device determines that the terminal device supports uplink enhancement, S604 is executed; if the terminal device determines that the terminal device does not support uplink enhancement, the terminal device executes S603.

[0222] It should be noted that if the terminal device supports uplink enhancement as an optional feature (i.e., the terminal device may support uplink enhancement or may not support uplink enhancement), the terminal device needs to determine whether the terminal device supports uplink enhancement (execute S602). If the terminal device supports uplink enhancement as a mandatory feature (i.e., the terminal device defaults to supporting uplink enhancement), the terminal device does not need to determine whether the terminal device supports uplink enhancement (does not execute S602).

[0223] That is to say, when the first candidate cell supports uplink enhancement as an optional feature and the terminal device supports uplink enhancement as an optional feature, the terminal device executes S601 and S602. When the first candidate cell supports uplink enhancement as a mandatory feature and the terminal device supports uplink enhancement as an optional feature, the terminal device does not execute S601 but only executes S602. When the first candidate cell supports uplink enhancement as an optional feature and the terminal device supports uplink enhancement as a mandatory feature, the terminal device only executes S601 but does not execute S602.

[0224] It should be noted that the embodiment of the present application does not limit the execution order of S601 and S602. That is, the terminal device may execute S601 first and then S602; or, the terminal device may execute S602 first and then S601; or, the terminal device may execute S601 and S602 at the same time.

[0225] Exemplarily, the terminal device first executes S602. If the terminal device determines that the terminal device supports uplink enhancement, the terminal device executes S601; if the terminal device determines that the terminal device does not support uplink enhancement, the terminal device executes S603. The terminal device executes S601, and if the terminal device determines that the first to-be-selected cell supports uplink enhancement, the terminal device executes S604; if the terminal device determines that the first to-be-selected cell does not support uplink enhancement, the terminal device executes S603.

[0226] S603: The terminal device determines that the uplink capability information indicates that the terminal device cannot perform uplink enhancement.

[0227] S604: The terminal device determines that the uplink capability information indicates that the terminal device is capable of uplink enhancement.

[0228] It is understandable that, through S601-S604, the terminal device can determine whether the terminal device can perform uplink enhancement. In this way, the terminal device can determine the cell selection parameter according to the uplink capability information by using the appropriate first offset, and then determine the appropriate cell.

[0229] It should be noted that the embodiment of the present application does not limit the execution order of S501 and S601-S604. That is, the terminal device may execute S501 first, and then execute S601-S604; or, the terminal device may execute S601-S604 first, and then execute S501; or, the terminal device may execute S501 and S601-S604 at the same time.

[0230] It should be noted that the terminal device can execute S501-S601-S604-S502 for any first selected cell among at least one first selected cell. After the terminal device executes S502, if the cell selection parameters of the first selected cell meet the cell selection criteria, it is determined that the first selected cell is the first cell (i.e., execute S503). If the cell selection parameters of the first selected cell do not meet the cell selection criteria, S501-S601-S604-S502 are executed for another first selected cell until the first cell is determined. Exemplarily, the terminal device executes S501-S601-S604-S502 on cell A. Afterwards, if the cell selection parameters of cell A meet the cell selection criteria, the terminal device determines that cell A is the first cell (i.e., the resident cell). If the cell selection parameters of cell A do not meet the cell selection criteria, the terminal device executes S501-S601-S604-S502 on cell B. If the cell selection parameter of cell B meets the cell selection criteria, the terminal device determines that cell B is the first cell (i.e., the cell to be camped on). If the cell selection parameter of cell B does not meet the cell selection criteria, the terminal device performs S501-S601-S604-S502 on another cell (e.g., cell C) until a cell that meets the cell selection criteria is determined.

[0231] Alternatively, the terminal device may obtain the first offset of each first candidate cell (ie, S501). Afterwards, the terminal device executes S601-S604-S502-S503. The specific process may refer to the above steps, which will not be described in detail here.

[0232] After the terminal device determines the first cell, that is, resides in a certain cell, it can also perform cell reselection, that is, the terminal device monitors the signal quality of the neighboring cells and the current cell (i.e., the first cell) in idle mode to select the best cell to provide services. Cell reselection includes high priority reselection, same priority reselection, and low priority reselection.

[0233] The following first introduces high priority reselection and low priority reselection. For example, Figure 7 A flowchart of a method for selecting a cell provided in an embodiment of the present application. The method for selecting a cell may be applicable to Figure 4 Communication between terminal devices and network devices is shown.

[0234] like Figure 7 As shown, the cell selection method includes the following steps:

[0235] S701. The terminal device obtains a second offset of at least one second selected cell.

[0236] The second offset is used to determine at least one cell reselection parameter of a second selected cell, and the cell reselection parameter includes: Srxlev and / or Squal. That is, the terminal device can determine Srxlev and / or Squal of the second selected cell according to the second offset of the second selected cell.

[0237] In the embodiment of the present application, the second offset includes a first type of offset and / or a second type of offset, wherein the first type of offset is used to determine Srxlev, and the second type of offset is used to determine Squal.

[0238] It should be noted that the second offset of the second selected cell can be located in the system information, for example, can be located in SIB4, and / or SIB5, and / or SIB6 (corresponding to the same-frequency neighboring cell, different-frequency neighboring cell, and different-system neighboring cell, respectively).

[0239] In the embodiment of the present application, at least one second cell to be selected includes the first cell and neighboring cells of the first cell.

[0240] In one possible design, the second offset of at least one second selected cell includes: the second offset of the first cell. That is, the terminal device only obtains the second offset of the first cell, and does not obtain the second offset of the neighboring cell of the first cell. In this way, the terminal device can only determine whether the first cell supports uplink enhancement, without determining whether the neighboring cell supports uplink enhancement.

[0241] In another possible design, the second offset of at least one second selected cell includes: the second offset of the first cell and the second offset of the neighboring cell of the first cell. The second offset of the first cell may be located in SIB1, and the second offset of the neighboring cell of the first cell may be located in SIB4, and / or SIB5, and / or SIB6. In other words, the terminal device obtains the second offset of each second selected cell. In this way, the terminal device needs to determine whether each second selected cell supports uplink enhancement.

[0242] In a possible implementation, the network device corresponding to the first cell may broadcast adjustment information of the first cell, where the adjustment information includes the second offset of the first cell. The terminal device may receive the adjustment information from the network device corresponding to the first cell to obtain the second offset of the first cell.

[0243] In another possible implementation, the network device corresponding to the first cell may broadcast adjustment information of the first cell and the neighboring cell, where the adjustment information includes the second offset of the first cell and the neighboring cell. The terminal device may receive the adjustment information from the network device corresponding to the first cell, and obtain the second offset of the first cell and the neighboring cell.

[0244] It should be noted that, for a specific introduction to the second offset, reference may be made to the description of the first offset in S501, which will not be repeated here.

[0245] S702. The terminal device determines a cell reselection parameter of at least one second to-be-selected cell using a second offset according to the uplink capability information of the terminal device.

[0246] The cell reselection parameters of the second selected cell include: Srxlev in Formula 5 and Squal in Formula 2, or Srxlev in Formula 1 and Squal in Formula 7, or Srxlev in Formula 5 and Squal in Formula 7.

[0247] In a possible implementation manner, if the terminal device only obtains the second offset of the first cell, the terminal device uses the second offset to determine the cell reselection parameters of the first cell according to the uplink capability information of the terminal device.

[0248] Another possible implementation manner is that if the terminal device obtains the second offset of the first cell and the neighboring cells of the first cell, the terminal device uses the second offset to determine the cell reselection parameters of each second selected cell according to the uplink capability information of the terminal device.

[0249] It should be noted that the process in which the terminal device determines the cell reselection parameters of at least one second selected cell using the second offset according to the uplink capability information of the terminal device can be referred to the description in S502 and will not be repeated here.

[0250] For a specific introduction to the process of the terminal device determining whether the terminal device can perform uplink enhancement in the second selected cell, please refer to S801-S804, which will not be described in detail here.

[0251] S703. The terminal device determines the second cell according to the cell reselection parameters.

[0252] The second cell is one of at least one second cell to be selected, and the at least one second cell to be selected also includes the first cell.

[0253] In some embodiments, when the terminal device performs high priority reselection, the terminal device determines the second cell according to Srxlev>ThreshX,HighP of the neighboring cell, or Squal>ThreshX,HighQ of the neighboring cell.

[0254] In a possible design, if the terminal device obtains the second offset of the neighboring cell, the Srxlev of the neighboring cell is the Srxlev in the above formula five, and the Squal of the neighboring cell is the Squal in formula seven.

[0255] In another possible design, if the terminal device fails to obtain the second offset of the neighboring cell, then the Srxlev of the neighboring cell is the Srxlev in Formula 1 above, and the Squal of the neighboring cell is the Squal in Formula 2.

[0256] In some other embodiments, when the terminal device performs low-priority reselection, the terminal device determines the second cell according to Srxlev of the first cell < ThreshServing,LowP and Srxlev of the neighboring cell > ThreshX,LowP; or the terminal device determines the second cell according to Squal of the first cell < ThreshServing,LowQ and Squal of the neighboring cell > ThreshX,LowQ.

[0257] In a possible design, if the terminal device obtains the second offset of the neighboring cell, then the Srxlev of the first cell and the neighboring cell is the Srxlev in Formula 5 above, and the Squal of the first cell and the neighboring cell is the Squal in Formula 7.

[0258] In another possible design, if the terminal device fails to obtain the second offset of the neighboring cell, then the Srxlev of the neighboring cell is the Srxlev in Formula 1 above, the Squal of the neighboring cell is the Squal in Formula 2, the Srxlev of the first cell is the Srxlev in Formula 5 above, and the Squal of the first cell is the Squal in Formula 7.

[0259] Based on the above technical solutions, when the terminal device determines cell reselection parameters (Srxlev and / or Squal) using the second offset, it combines the uplink capability information of the terminal device. The uplink capability information of the terminal device can indicate whether the terminal device is capable of uplink enhancement. Thus, with this solution, for terminal devices capable of uplink enhancement, their cell reselection parameters may be different from those of terminal devices that cannot perform uplink enhancement. Therefore, in this solution, different cell reselection parameters can be used for the above two types of terminal devices to perform cell selection to ensure normal communication between the terminal device and the selected cell.

[0260] Moreover, by adopting this scheme, if a terminal device that cannot perform uplink enhancement needs to access the cell, the distance between the terminal device and the network device needs to be closer to meet the cell reselection criteria. In this way, even if the terminal device cannot perform uplink enhancement, the normal communication between the terminal device and the network device can still be guaranteed because the distance between the terminal device and the network device is close and the signal is good. In contrast, for a terminal device that can perform uplink enhancement, the terminal device can meet the cell reselection criteria when the distance between the terminal device and the network device is far, and then reselect to the second cell, making full use of the service resources of the cell. For a terminal device that supports uplink enhancement, when the distance between the terminal device and multiple network devices is the same or similar, it is possible that the terminal device does not meet the cell reselection criteria in the second selected cell that does not support uplink enhancement, but can meet the cell reselection criteria in the second selected cell that supports uplink enhancement, then the terminal device can reselect to the second cell, ensuring the continuity of the communication services between the terminal device and the network device, enhancing the reliability of mobility management, and making full use of the service resources of the cell.

[0261] The following describes the process by which a terminal device determines whether it can perform uplink enhancement in a neighboring cell. Figure 8 , is a flow chart of a method for determining uplink capability information provided in an embodiment of the present application. Figure 8 As shown, the method for determining the uplink capability information includes S801-S804.

[0262] S801. The terminal device determines whether the second selected cell supports uplink enhancement.

[0263] The second cells to be selected include the first cell and neighboring cells of the first cell.

[0264] In the embodiment of the present application, the terminal device can respectively determine whether the first cell and the neighboring cell support uplink enhancement. The process of the terminal device determining whether the first cell supports uplink enhancement can refer to S601 and is not described here. The following takes the example of the terminal device determining whether the neighboring cell supports uplink enhancement to introduce this embodiment.

[0265] In a possible implementation manner, the terminal device may obtain indication information of a neighboring cell, where the indication information is used to indicate whether the neighboring cell supports uplink enhancement. The terminal device determines whether the neighboring cell supports uplink enhancement according to the indication information.

[0266] The indication information may be located in the system information, for example, the indication information may be located in SIB4, and / or SIB5, and / or SIB6. Exemplarily, the network device may broadcast the system information. Afterwards, the terminal device may receive the system information from the network device, obtain the indication information (the indication information corresponds to the neighboring cell in the neighboring cell list), and determine whether the neighboring cell supports uplink enhancement. For example, the indication information may be a bitmap. The i-th bit in the bitmap corresponds to the i-th cell in at least one selected cell. When the i-th bit position is 0, it is used to indicate that the i-th cell in the neighboring cell list does not support uplink enhancement; when the i-th bit position is 1, it is used to indicate that the i-th cell in the neighboring cell list supports uplink enhancement.

[0267] Another possible implementation manner is to add an indication field in the cell information corresponding to each cell in the neighbor cell list (including each of the above neighbor cells), and the indication field is used to indicate whether the corresponding cell supports uplink enhancement.

[0268] Another possible implementation method is to agree on the correspondence between the frequency information of a cell and whether the cell supports uplink enhancement through a protocol; the terminal device can determine whether the neighboring cell supports uplink enhancement according to the protocol. Exemplarily, the terminal device can obtain the frequency information of the neighboring cell and determine whether the neighboring cell supports uplink enhancement through a protocol.

[0269] In one possible design, if the terminal device determines that the neighboring cell or the first cell supports uplink enhancement, the terminal device executes S802; if the terminal device determines that the neighboring cell does not support uplink enhancement, the terminal device executes S803.

[0270] It should be noted that if the neighboring cell (or the first cell) supports uplink enhancement as an optional feature (i.e., the neighboring cell may support uplink enhancement or may not support uplink enhancement), the terminal device needs to determine whether the neighboring cell supports uplink enhancement (execute S801). If the neighboring cell supports uplink enhancement as a mandatory feature (i.e., the terminal device assumes that the neighboring cell supports uplink enhancement by default), the terminal device does not need to determine whether the neighboring cell supports uplink enhancement (does not execute S801).

[0271] S802. The terminal device determines whether the terminal device supports uplink enhancement.

[0272] It should be noted that whether the terminal device supports uplink enhancement is related to the hardware device and configuration information of the terminal device. The terminal device can obtain information on whether the terminal device supports uplink enhancement.

[0273] In one possible design, if the terminal device determines that the terminal device supports uplink enhancement, S804 is executed; if the terminal device determines that the terminal device does not support uplink enhancement, the terminal device executes S803.

[0274] It should be noted that if the terminal device supports uplink enhancement as an optional feature (i.e., the terminal device may support uplink enhancement or may not support uplink enhancement), the terminal device needs to determine whether the terminal device supports uplink enhancement (execute S802). If the terminal device supports uplink enhancement as a mandatory feature (i.e., the terminal device defaults to supporting uplink enhancement), the terminal device does not need to determine whether the terminal device supports uplink enhancement (does not execute S802).

[0275] That is to say, when the neighboring cell (or the first cell) supports uplink enhancement as an optional feature and the terminal device supports uplink enhancement as an optional feature, the terminal device executes S801 and S802. When the neighboring cell (or the first cell) supports uplink enhancement as a mandatory feature and the terminal device supports uplink enhancement as an optional feature, the terminal device does not execute S801 but only executes S802. When the neighboring cell (or the first cell) supports uplink enhancement as an optional feature and the terminal device supports uplink enhancement as a mandatory feature, the terminal device only executes S801 and does not execute S802.

[0276] It should be noted that the embodiment of the present application does not limit the execution order of S801 and S802. That is, the terminal device may execute S801 first and then execute S802; or, the terminal device may execute S802 first and then execute S801; or, the terminal device may execute S801 and S802 at the same time.

[0277] S803: The terminal device determines that the uplink capability information indicates that the terminal device cannot perform uplink enhancement.

[0278] S804: The terminal device determines that the uplink capability information indicates that the terminal device is capable of uplink enhancement.

[0279] It is understandable that, through S801-S804, the terminal device can determine whether the terminal device can perform uplink enhancement. In this way, the terminal device can determine the cell reselection parameter according to the uplink capability information by using the appropriate second offset, and then determine the appropriate cell.

[0280] The following first introduces the reselection of the same priority. For example, Fig. 9 A flowchart of a method for selecting a cell provided in an embodiment of the present application. The method for selecting a cell may be applicable to Figure 4 Communication between terminal devices and network devices is shown.

[0281] like Fig. 9 As shown, the cell selection method includes the following steps:

[0282] S901. The terminal device obtains a third offset of at least one second selected cell.

[0283] In the embodiment of the present application, the second cells to be selected include the first cell and neighboring cells of the first cell.

[0284] In some embodiments, before acquiring the third offset of at least one second cell to be selected, the terminal device may determine that a cell that satisfies the above condition 2, condition 3, or condition 4 among multiple cells to be selected is the second cell to be selected. That is, the cell that satisfies the above condition 2, condition 3, or condition 4 among the first cell and the neighboring cells of the first cell is the second cell to be selected.

[0285] The third offset is used to determine the R value of at least one second selected cell.

[0286] It should be noted that the third offset may include one or more offset parameters. The third offset may represent a power value, a level value, a quality value, etc., which is not limited in the embodiments of the present application. Moreover, the offset parameter included in the third offset may be a positive number, 0, or a negative number. For example, the third offset includes 1 decibel relative to one milliwatt (dBm); for another example, the third offset includes 0dBm and -3dBm; for another example, the third offset includes 3dBm and -5dBm.

[0287] In a possible implementation, the network device may broadcast adjustment information of the first cell and the neighboring cells, the adjustment information including the third offset. Afterwards, the terminal device may receive the adjustment information from the network device and obtain the third offset of each cell.

[0288] The adjustment information may be located in the system information, for example, in SIB4, and / or SIB5, and / or SIB6.

[0289] S902. The terminal device determines an R value of at least one second selected cell using a third offset according to the uplink capability information of the terminal device.

[0290] In a possible implementation, the terminal device determines whether the terminal device can perform uplink enhancement, uses the third offset of the first cell to determine the R value of the first cell, and uses the third offset of the neighboring cell to determine the R value of the neighboring cell.

[0291] Among them, R s The following formula can be satisfied:

[0292] R s =Q meas,s +Q hyst –Q offsettemp +P s Formula eight.

[0293] Among them, R s represents the R value of the first cell, Q meas,s Represents the RSRP measurement quantity used for cell reselection, Q hyst represents the hysteresis factor of the sorting criterion, Q offsettemp Indicates the offset, P s Represents the third offset of the above-mentioned service cell.

[0294] Among them, R n The following formula can be satisfied:

[0295] R n =Q meas,s +Q offset –Q offsettemp +P n Formula nine.

[0296] Among them, R n represents the R value of the neighboring area, Q meas,s Represents the RSRP measurement quantity used for cell reselection, Q offset represents the hysteresis factor of the sorting criterion, Q offsettemp Indicates the offset, P n Indicates the third offset of the above neighboring cell.

[0297] It should be noted that the process by which the terminal device determines whether the terminal device is capable of uplink enhancement can be referred to S801-S804 and will not be described in detail here.

[0298] In the embodiment of the present application, the third offset includes a fifth offset parameter and a sixth offset parameter. If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the terminal device uses the fifth offset parameter to determine R s and R n If the uplink capability information indicates that the terminal device cannot perform uplink enhancement, the terminal device uses the sixth offset parameter to determine R s and R n . Wherein, the fifth offset parameter is greater than the sixth offset parameter.

[0299] It should be noted that the terminal device is able to perform uplink enhancement includes: the terminal device supports uplink enhancement, and the first cell supports uplink enhancement; the terminal device cannot perform uplink enhancement includes: the terminal device does not support uplink enhancement, or the first cell does not support uplink enhancement.

[0300] In one possible design, if the uplink capability information indicates that the terminal device is capable of uplink enhancement, the fifth offset parameter is equal to 0. The fifth offset parameter is equal to 0, that is, Formula 8 is the same as Formula 3, and / or Formula 9 is the same as Formula 4. That is, R is not changed. s and / or R nIf the uplink capability information indicates that the terminal device cannot perform uplink enhancement, the sixth offset parameter is less than 0.

[0301] In another possible design, if the uplink capability information indicates that the terminal device can perform uplink enhancement, the fifth offset parameter is greater than 0. If the uplink capability information indicates that the terminal device cannot perform uplink enhancement, the sixth offset parameter is less than or equal to 0.

[0302] It should be noted that the size of the third offset is also related to the size of the uplink transmission power of the terminal device. That is, the terminal device can use the third type of offset to determine R according to the uplink transmission power of the terminal device (determined by the degree of uplink enhancement and the degree of capacity reduction). s and R n .

[0303] It should be noted that, for the specific introduction of the fifth offset parameter, reference may be made to the description of the first offset parameter in S502 above; for the specific introduction of the sixth offset parameter, reference may be made to the description of the second offset parameter in S502 above, which will not be repeated here.

[0304] S903. The terminal device determines the third cell according to the R value.

[0305] The third cell is one of at least one second selected cell, and the third cell satisfies the above-mentioned condition 2, condition 3, or condition 4.

[0306] In a possible implementation, the terminal device uses R in Formula 8 s and R in Formula 9 n , determine the third cell.

[0307] Based on the above technical solution, when the terminal device uses the third offset to determine the R value, the uplink capability information of the terminal device is combined. The uplink capability information of the terminal device can indicate whether the terminal device is capable of uplink enhancement. In this way, using this solution, when the terminal device supports uplink enhancement, the method for determining the R value is different for the second selected cell that supports uplink enhancement and the second selected cell that does not support uplink enhancement. And it should be understood that the terminal device can sort the R value of the cell where the terminal device is currently resident and the R value of the neighboring cell. Therefore, in this solution, when sorting the above two types of second selected cells, different R value determination methods are used to ensure normal communication between the terminal device and the selected cell.

[0308] Moreover, with this solution, if a terminal device that cannot perform uplink enhancement needs to access the cell, the distance between the terminal device and the network device needs to be closer to meet the cell reselection criteria. In this way, even if the terminal device cannot perform uplink enhancement, the normal communication between the terminal device and the network device can still be guaranteed because the distance between the terminal device and the network device is closer and the signal is better. For terminal devices that can use uplink enhancement, when the distance between the terminal device and multiple network devices is the same or similar, the cell that supports uplink enhancement is ranked higher using the R criterion than the cell that does not support uplink enhancement, that is, the terminal device is more inclined to reside in the cell that supports uplink enhancement, thereby enhancing the reliability of mobility management and making full use of the service resources of the cell.

[0309] It should be noted that, in the above embodiment, the second selected cell includes the first cell and the neighboring cells of the first cell. The neighboring cells of the first cell include the same-frequency neighboring cells of the first cell, and / or, the same-priority neighboring cells, and / or, the high-priority neighboring cells, and / or, the low-priority neighboring cells. In the case where the neighboring cells of the first cell include: the same-frequency neighboring cells and / or the same-priority neighboring cells, the high-priority neighboring cells and / or the low-priority neighboring cells, the terminal device can execute both S701-S703 and S901-S903.

[0310] Combination of the above Figure 5-Figure 9 The cell selection method provided in the embodiment of the present application is described in detail. Figure 10-11 The communication device provided in the embodiment of the present application is described in detail.

[0311] For example, Fig.10 Schematic diagram of the structure of the cell selection device provided in the embodiment of the present application. Fig.10 As shown, the cell selection device 1000 includes: an acquisition unit 1001 and a determination unit 1002. For ease of description, Fig.10 Only the main components of the cell selection device are shown.

[0312] In a possible design, the cell selection device 1000 may be applicable to Figure 4 In the communication system shown, execution Figure 5-Figure 9 The function of selecting a cell in the cell selection method shown.

[0313] Among them, the acquisition unit 1001 is used to obtain the first offset of at least one first cell to be selected, and the first offset is used to determine the cell selection parameters of at least one first cell to be selected, and the cell selection parameters include: the cell selection reception level value Srxlev and / or the cell selection reception quality value Squal. The determination unit 1002 is used to determine the cell selection parameters of at least one first cell to be selected using the first offset according to the uplink capability information of the terminal device; the uplink capability information is used to indicate whether the terminal device can perform uplink enhancement. The determination unit 1002 is also used to determine the first cell according to the cell selection parameters; the first cell is one of the at least one first cell to be selected.

[0314] Optionally, the first offset includes: a first type offset, and the first type offset is used to determine Srxlev.

[0315] Optionally, the determination unit 1002 is specifically used to determine the Srxlev of the first selected cell using the first offset parameter in the first type of offset if the uplink capability information indicates that the terminal device is capable of uplink enhancement. If the uplink capability information indicates that the terminal device is not capable of uplink enhancement, the Srxlev of the first selected cell is determined using the second offset parameter in the first type of offset. The first offset parameter is greater than the second offset parameter; the terminal device is capable of uplink enhancement including: the terminal device supports uplink enhancement, and the first selected cell supports uplink enhancement; the terminal device is not capable of uplink enhancement including: the terminal device does not support uplink enhancement, or the first selected cell does not support uplink enhancement.

[0316] Optionally, the first offset parameter is equal to 0, and the second offset parameter is less than 0; or, the first offset parameter is greater than 0, and the second offset parameter is less than or equal to 0.

[0317] Optionally, the first offset includes: a second type of offset, and the second type of offset is used to determine Squal.

[0318] Optionally, the determination unit 1002 is specifically used to determine the Squal of the first selected cell using the third offset parameter in the second type of offset if the uplink capability information indicates that the terminal device is capable of uplink enhancement. If the uplink capability information indicates that the terminal device is not capable of uplink enhancement, the Squal of the first selected cell is determined using the fourth offset parameter in the second type of offset. The third offset parameter is greater than the fourth offset parameter; the terminal device is capable of uplink enhancement also includes: the terminal device supports uplink enhancement, and the first selected cell supports uplink enhancement; the terminal device is not capable of uplink enhancement also includes: the terminal device does not support uplink enhancement, or the first selected cell does not support uplink enhancement.

[0319] Optionally, the third offset parameter is equal to 0, and the fourth offset parameter is less than 0; or, the third offset parameter is greater than 0, and the fourth offset parameter is less than or equal to 0.

[0320] Optionally, the acquisition unit 1001 is further used to acquire indication information of at least one first candidate cell, where the indication information is used to indicate whether the corresponding cell supports uplink enhancement.

[0321] Optionally, the acquisition unit 1001 is further used to acquire a second offset of at least one second cell to be selected, and the second offset is used to determine a cell reselection parameter of at least one second cell to be selected, and the cell reselection parameter includes: Srxlev and / or Squal. The determination unit 1002 is further used to determine the cell reselection parameter of at least one second cell to be selected based on the uplink capability information of the terminal device using the second offset. The determination unit 1002 is further used to determine a second cell based on the cell reselection parameter; the second cell is one of the at least one second cell to be selected.

[0322] Optionally, the acquisition unit 1001 is further used to acquire a third offset of at least one second selected cell, and the third offset is used to determine the R value of at least one second selected cell. The determination unit 1002 is further used to determine the R value of at least one second selected cell using the third offset according to the uplink capability information of the terminal device. The determination unit 1002 is further used to determine a third cell according to the R value, and the third cell is one of the at least one second selected cell.

[0323] Optionally, the determination unit 1002 is further specifically used to determine the R value of the second selected cell using the fifth offset parameter in the third offset of the second selected cell if the uplink capability information indicates that the terminal device is capable of uplink enhancement. If the uplink capability information indicates that the terminal device is not capable of uplink enhancement, the R value of the second selected cell is determined using the sixth offset parameter in the third offset of the second selected cell. Among them, the fifth offset parameter is greater than the sixth offset parameter; the terminal device is capable of uplink enhancement includes: the terminal device supports uplink enhancement, and the second selected cell supports uplink enhancement; the terminal device is not capable of uplink enhancement includes: the terminal device does not support uplink enhancement, or the second selected cell does not support uplink enhancement.

[0324] Optionally, the fifth offset parameter is equal to 0, and the sixth offset parameter is less than 0; or, the fifth offset parameter is greater than 0, and the sixth offset parameter is less than or equal to 0.

[0325] Optionally, Fig.10 The cell selection device 1000 shown may also include a storage module ( Fig.10 (not shown in the figure), the storage module stores a program or instruction. When the determination unit 1002 executes the program or instruction, the cell selection device 1000 can execute Figure 5 The function of selecting a cell in the cell selection method shown.

[0326] It should be noted that the cell selection device 1000 may be Figure 4 Any terminal device or any network device shown may also be a chip (system) or other parts or components arranged in the above-mentioned terminal device or network device, and the embodiments of the present application are not limited to this.

[0327] In addition, the technical effects of the cell selection device 1000 can be referred to respectively. Figure 5-Figure 9 The technical effects of the cell selection method shown are not repeated here.

[0328] For example, Fig.11 This is a schematic diagram of the structure of a cell selection device provided in an embodiment of the present application. The cell selection device may be a terminal device or a network device, or may be a chip (system) or other component or assembly that can be set in the terminal device or the network device. Fig.11 As shown, the cell selection device 1100 may include a processor 1101. Optionally, the cell selection device 1100 may further include a memory 1102 and / or a transceiver 1103. The processor 1101 is coupled to the memory 1102 and the transceiver 1103, such as being connected via a communication bus.

[0329] Combine the following Fig.11 The components of the cell selection device 1100 are specifically introduced:

[0330] The processor 1101 is the control center of the network device, which may be a processor or a general term for multiple processing elements. For example, the processor 1101 is one or more central processing units (CPUs), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more microprocessors (digital signal processors, DSPs), or one or more field programmable gate arrays (FPGAs).

[0331] Optionally, the processor 1101 may perform various functions of the network device by running or executing a software program stored in the memory 1102 , and calling data stored in the memory 1102 .

[0332] In a specific implementation, as an embodiment, the network device may also include multiple processors, such as Fig.11 1 and 1104. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here may refer to one or more communication devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0333] The memory 1102 is used to store the software program for executing the solution of the present application, and the execution is controlled by the processor 1101. The specific implementation method can refer to the above method embodiment, which will not be repeated here.

[0334] Optionally, the memory 1102 may be a read-only memory (ROM) or other types of static storage communication devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage communication devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage communication device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1102 may be integrated with the processor 1101, or may exist independently and be accessed through the input / output port ( Fig.11 1101) is coupled to the processor 1101, which is not specifically limited in the embodiments of the present application.

[0335] The transceiver 1103 is used for communication with other network devices. For example, if the network device is a terminal device, the transceiver 1103 can be used to communicate with the network device, or with another terminal device. For another example, if the network device is a network device, the transceiver 1103 can be used to communicate with the terminal device, or with another network device.

[0336] Optionally, the transceiver 1103 may include a receiver and a transmitter ( Fig.11 The receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0337] Optionally, the transceiver 1103 may be integrated with the processor 1101, or may exist independently and be connected to the network device through an input / output port ( Fig.11 1101) is coupled to the processor 1101, which is not specifically limited in the embodiments of the present application.

[0338] It should be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0339] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0340] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0341] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0342] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0343] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0344] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0345] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0346] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0347] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0348] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0349] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0350] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for selecting a cell, characterized in that: The method comprises: Acquire a first offset of at least one first to-be-selected cell, where the first offset is used to determine a cell selection parameter of the at least one first to-be-selected cell, where the cell selection parameter includes: a cell selection reception level value Srxlev and / or a cell selection reception quality value Squal; Determining a cell selection parameter of the at least one first to-be-selected cell according to uplink capability information of the terminal device; the uplink capability information is used to indicate whether the terminal device is capable of uplink enhancement; A first cell is determined according to the cell selection parameter; the first cell is one of the at least one first cell to be selected.

2. The method according to claim 1, characterized in that The first offset includes: a first type of offset, and the first type of offset is used to determine the Srxlev.

3. The method according to claim 2, characterized in that The determining, according to the uplink capability information of the terminal device, a cell selection parameter of the at least one first to-be-selected cell includes: For any first to-be-selected cell among the at least one first to-be-selected cell, performing the following steps to determine the Srxlev of the first to-be-selected cell; If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the Srxlev of the first selected cell is determined by using the first offset parameter in the first type of offset; If the uplink capability information indicates that the terminal device cannot perform uplink enhancement, the Srxlev of the first selected cell is determined by using the second offset parameter in the first type of offset; Among them, the first offset parameter is greater than the second offset parameter; the terminal device is able to perform uplink enhancement includes: the terminal device supports uplink enhancement, and the first selected cell supports uplink enhancement; the terminal device cannot perform uplink enhancement includes: the terminal device does not support uplink enhancement, or the first selected cell does not support uplink enhancement.

4. The method according to claim 3, characterized in that The first offset parameter is equal to 0, and the second offset parameter is less than 0; or, the first offset parameter is greater than 0, and the second offset parameter is less than or equal to 0.

5. The method according to any one of claims 1 to 4, characterized in that The first offset includes: a second type of offset, and the second type of offset is used to determine the Squal.

6. The method according to claim 5, characterized in that The determining, according to the uplink capability information of the terminal device, a cell selection parameter of the at least one first to-be-selected cell includes: For any first candidate cell among the at least one first candidate cell, perform the following steps to determine Squal of the first candidate cell; If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the Squal of the first selected cell is determined using the third offset parameter in the second type of offset; If the uplink capability information indicates that the terminal device cannot perform uplink enhancement, using the fourth offset parameter in the second type of offset to determine the Squal of the first selected cell; Among them, the third offset parameter is greater than the fourth offset parameter; the terminal device is able to perform uplink enhancement also includes: the terminal device supports uplink enhancement, and the first selected cell supports uplink enhancement; the terminal device cannot perform uplink enhancement also includes: the terminal device does not support uplink enhancement, or the first selected cell does not support uplink enhancement.

7. The method according to claim 6, characterized in that The third offset parameter is equal to 0, and the fourth offset parameter is less than 0; or, the third offset parameter is greater than 0, and the fourth offset parameter is less than or equal to 0.

8. The method according to any one of claims 3, 4, 6 or 7, characterized in that The method further comprises: Obtain indication information of the at least one first candidate cell, where the indication information is used to indicate whether the corresponding cell supports uplink enhancement.

9. The method according to any one of claims 1 to 8, characterized in that After determining the first cell according to the cell selection parameter, the method further includes: Acquire a second offset of at least one second cell to be selected, where the second offset is used to determine a cell reselection parameter of the at least one second cell to be selected, where the cell reselection parameter includes: Srxlev and / or Squal; Determining a cell reselection parameter of the at least one second to-be-selected cell according to the uplink capability information of the terminal device; A second cell is determined according to the cell reselection parameter; the second cell is one of the at least one second cell to be selected.

10. The method according to any one of claims 1 to 8, characterized in that After determining the first cell according to the cell selection parameter, the method further includes: Acquire a third offset of at least one second cell to be selected, where the third offset is used to determine an R value of the at least one second cell to be selected; Determining an R value of the at least one second selected cell according to the uplink capability information of the terminal device; A third cell is determined according to the R value, where the third cell is one of the at least one second cell to be selected.

11. The method according to claim 10, characterized in that The determining, according to the uplink capability information of the terminal device, the R value of the at least one second selected cell includes: For each second to be selected cell in the at least one second to be selected cell, perform the following steps to determine the R value of the second to be selected cell; If the uplink capability information indicates that the terminal device is capable of uplink enhancement, determining the R value of the second to-be-selected cell by using a fifth offset parameter in the third offset of the second to-be-selected cell; If the uplink capability information indicates that the terminal device cannot perform uplink enhancement, determining the R value of the second to-be-selected cell by using a sixth offset parameter in the third offset of the second to-be-selected cell; Among them, the fifth offset parameter is greater than the sixth offset parameter; the terminal device is able to perform uplink enhancement includes: the terminal device supports uplink enhancement, and the second selected cell supports uplink enhancement; the terminal device cannot perform uplink enhancement includes: the terminal device does not support uplink enhancement, or the second selected cell does not support uplink enhancement.

12. The method according to claim 11, characterized in that The fifth offset parameter is equal to 0, and the sixth offset parameter is less than 0; or, the fifth offset parameter is greater than 0, and the sixth offset parameter is less than or equal to 0.

13. A cell selection device, characterized in that: The device comprises: An acquiring unit, configured to acquire a first offset of at least one first cell to be selected, wherein the first offset is used to determine a cell selection parameter of the at least one first cell to be selected, wherein the cell selection parameter includes: a cell selection reception level value Srxlev and / or a cell selection reception quality value Squal; A determination unit, configured to determine a cell selection parameter of the at least one first to-be-selected cell according to uplink capability information of the terminal device; the uplink capability information is used to indicate whether the terminal device is capable of uplink enhancement; The determining unit is further configured to determine a first cell according to the cell selection parameter; the first cell is one of the at least one first cell to be selected.

14. The device according to claim 13, characterized in that The first offset includes: a first type of offset, and the first type of offset is used to determine the Srxlev.

15. The device according to claim 14, characterized in that The determining unit is further configured to determine a first cell according to the cell selection parameter; the first cell is one of the at least one first cell to be selected, including: For any first to-be-selected cell among the at least one first to-be-selected cell, the determining unit performs the following steps to determine the Srxlev of the first to-be-selected cell; If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the Srxlev of the first selected cell is determined by using the first offset parameter in the first type of offset; If the uplink capability information indicates that the terminal device cannot perform uplink enhancement, the Srxlev of the first selected cell is determined by using the second offset parameter in the first type of offset; Among them, the first offset parameter is greater than the second offset parameter; the terminal device is able to perform uplink enhancement includes: the terminal device supports uplink enhancement, and the first selected cell supports uplink enhancement; the terminal device cannot perform uplink enhancement includes: the terminal device does not support uplink enhancement, or the first selected cell does not support uplink enhancement.

16. The device according to claim 15, characterized in that The first offset parameter is equal to 0, and the second offset parameter is less than 0; or, the first offset parameter is greater than 0, and the second offset parameter is less than or equal to 0.

17. The device according to any one of claims 13 to 16, characterized in that The first offset includes: a second type of offset, and the second type of offset is used to determine the Squal.

18. The device according to claim 17, characterized in that The determining unit is further configured to determine a first cell according to the cell selection parameter; the first cell is one of the at least one first cell to be selected, including: For any first candidate cell among the at least one first candidate cell, the determining unit performs the following steps to determine the Squal of the first candidate cell; If the uplink capability information indicates that the terminal device is capable of uplink enhancement, the Squal of the first selected cell is determined using the third offset parameter in the second type of offset; If the uplink capability information indicates that the terminal device cannot perform uplink enhancement, using the fourth offset parameter in the second type of offset to determine the Squal of the first selected cell; Among them, the third offset parameter is greater than the fourth offset parameter; the terminal device is able to perform uplink enhancement also includes: the terminal device supports uplink enhancement, and the first selected cell supports uplink enhancement; the terminal device cannot perform uplink enhancement also includes: the terminal device does not support uplink enhancement, or the first selected cell does not support uplink enhancement.

19. The device according to claim 18, characterized in that The third offset parameter is equal to 0, and the fourth offset parameter is less than 0; or, the third offset parameter is greater than 0, and the fourth offset parameter is less than or equal to 0.

20. The device according to any one of claims 15, 16, 18 or 19, characterized in that The acquisition unit is further used to acquire indication information of the at least one first candidate cell, where the indication information is used to indicate whether the corresponding cell supports uplink enhancement.

21. The device according to any one of claims 13 to 20, characterized in that The acquisition unit is further used to acquire a second offset of at least one second cell to be selected, where the second offset is used to determine a cell reselection parameter of the at least one second cell to be selected, where the cell reselection parameter includes: Srxlev and / or Squal; The determining unit is further configured to determine a cell reselection parameter of the at least one second to-be-selected cell according to the uplink capability information of the terminal device; The determining unit is further configured to determine a second cell according to the cell reselection parameter; the second cell is one of the at least one second selected cell.

22. The device according to any one of claims 13 to 20, characterized in that The acquisition unit is further used to acquire a third offset of at least one second cell to be selected, where the third offset is used to determine an R value of the at least one second cell to be selected; The determining unit is further configured to determine the R value of the at least one second selected cell according to the uplink capability information of the terminal device; The determining unit is further configured to determine a third cell according to the R value, where the third cell is one of the at least one second cell to be selected.

23. The device according to claim 22, characterized in that The determining unit is further configured to: For each second cell to be selected in the at least one second cell to be selected, the determining unit performs the following steps to determine an R value of the second cell to be selected; If the uplink capability information indicates that the terminal device is capable of uplink enhancement, determining the R value of the second to-be-selected cell by using a fifth offset parameter in the third offset of the second to-be-selected cell; If the uplink capability information indicates that the terminal device cannot perform uplink enhancement, determining the R value of the second to-be-selected cell by using a sixth offset parameter in the third offset of the second to-be-selected cell; Among them, the fifth offset parameter is greater than the sixth offset parameter; the terminal device is able to perform uplink enhancement includes: the terminal device supports uplink enhancement, and the second selected cell supports uplink enhancement; the terminal device cannot perform uplink enhancement includes: the terminal device does not support uplink enhancement, or the second selected cell does not support uplink enhancement.

24. The device according to claim 23, characterized in that The fifth offset parameter is equal to 0, and the sixth offset parameter is less than 0; or, the fifth offset parameter is greater than 0, and the sixth offset parameter is less than or equal to 0.

25. A cell selection device, characterized in that: The cell selection device includes: a processor, the processor is coupled to a memory; The memory is used to store computer programs; The processor is configured to execute the computer program stored in the memory, so that the cell selection device performs the cell selection method according to any one of claims 1 to 12.

26. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a computer program or an instruction. When the computer program or the instruction is executed on a computer, the computer is enabled to execute the method for selecting a cell according to any one of claims 1 to 12.

27. A computer program product, characterized in that The computer program product comprises: a computer program or an instruction, and when the computer program or the instruction is executed on a computer, the computer is enabled to execute the method for selecting a cell according to any one of claims 1 to 12.

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