Method for selecting cell, terminal device, and network device

1. A method for selecting a cell, comprising:

searching, by a terminal device, for a target frequency point according to at least one of pre-configured first configuration information, second configuration information configured by a network device through dynamic signaling, and a working mode set by a user; and

performing, according to a situation of cells at the target frequency point, cell selection or cell reselection;

wherein the first configuration information comprises information of a first frequency point set and/or first frequency priority information, and the second configuration information comprises information of a second frequency point set and/or second frequency priority information; and

wherein searching, by the terminal device, for the target frequency point according to at least one of the pre-configured first configuration information, the second configuration information configured by the network device through the dynamic signaling, and the working mode set by the user, comprises:

if the user sets the working mode to indicate to perform cell selection or cell reselection only in an unlicensed frequency band, determining, by the terminal device among the first frequency point set or the second frequency point set, a frequency point inside the unlicensed frequency band as the target frequency point, and searching for the target frequency point; or

if the user does not set the working mode to indicate to perform cell selection or reselection only in an unlicensed frequency band, determining, by the terminal device, a frequency point among frequency points inside unlicensed frequency band and licensed frequency band as the target frequency point, wherein the frequency points belong to the first frequency point set or the second frequency point set, and performing searching by searching for the target frequency point.

2. The method according to claim 1 , wherein the second frequency priority information is determined by the network device according to at least one of the capability of the terminal device, subscription information and the reference of the terminal device and is configured to the terminal device through dynamic signaling.

3. The method according to claim 1 , wherein the second frequency priority information has a priority higher than a priority of the first frequency priority information, and the working mode set by the user has a priority higher than the first configuration information and the second configuration information.

4. The method according to claim 1 , wherein the first frequency priority information is used to indicate a priority order of the frequency points of the licensed frequency band and the unlicensed frequency band, and searching, by the terminal device, for the target frequency point according to at least one of the pre-configured first configuration information, the second configuration information configured by the network device through the dynamic signaling, and the working mode set by the user comprises:

if the priority of the frequency points of the unlicensed frequency band is higher than the priority of the frequency points of the licensed frequency band, determining, preferentially by the terminal device among the first frequency point set, the frequency point inside the unlicensed frequency band, as the target frequency point, and searching for the target frequency point; or

if the priority of the frequency points of the licensed frequency band is higher than the priority of the frequency points of the unlicensed frequency band, determining, preferentially by the terminal device among the first frequency point set, the frequency point inside the licensed frequency band, as the target frequency point, and searching for the target frequency point.

5. The method according to claim 1 , wherein the second frequency priority information is used to indicate a priority order of the frequency points of the licensed frequency band and the unlicensed frequency band, and searching, by the terminal device, for the target frequency point according to at least one of the pre-configured first configuration information, the second configuration information configured by the network device through the dynamic signaling, and the working mode set by the user comprises:

if the priority of the frequency points of the unlicensed frequency band is higher than the priority of the frequency points of the licensed frequency band, determining, preferentially by the terminal device among the second frequency point set, the frequency point inside the unlicensed frequency band, as the target frequency point, and searching for the target frequency point; or

if the priority of the frequency points of the licensed frequency band is higher than the priority of the frequency points of the unlicensed frequency band, determining, preferentially by the terminal device among the second frequency point set, the frequency point inside the licensed frequency band, as the target frequency point, and searching for the target frequency point.

6. A method for selecting a cell, comprising:

searching, by a terminal device, for a target frequency point according to at least one of pre-configured first configuration information, second configuration information configured by a network device through dynamic signaling, and a working mode set by a user; and

performing, according to a situation of cells at the target frequency point, cell selection or cell reselection; and

receiving, by the terminal device, a master information block MIB of a first cell corresponding to the target frequency point, wherein the MIB comprises indication information, and the indication information is used to indicate whether the first cell supports a primary cell function; and

wherein the performing cell selection or cell reselection according to the situation of cells at the target frequency point comprises: performing, by the terminal device, cell selection or cell reselection according to the indication information.

7. The method according to claim 6 , wherein performing, by the terminal device, cell selection according to the indication information comprises:

if the indication information indicates that the first cell supports the primary cell function, determining, by the terminal device, whether to camp on the first cell according to a signal quality of the first cell; or

if the indication information indicates that the first cell does not support the primary cell function, determining, by the terminal device, not to camp on the first cell.

8. The method according to claim 6 , further comprising:

receiving, by the terminal device, a system information block SIB of the first cell corresponding to the target frequency point, wherein the SIB comprises a cell reselection condition, and the cell reselection condition comprises a signal quality difference threshold for a difference between a signal quality of a neighboring cell and a signal quality of a local cell, and performing, by the terminal device, cell reselection according to the indication information comprises:

if the indication information indicates that the first cell supports the primary cell function, determining, by the terminal device, whether to reselect from the second cell to the first cell according to whether the difference between the signal quality of the first cell and the signal quality of the second cell where the terminal device currently camps exceeds the signal quality difference threshold; or

if the indication information indicates that the first cell does not support the primary cell function, determining, by the terminal device, not to reselect from the second cell to the first cell; or

wherein after the terminal device determines to perform cell reselection, the method further comprises:

if the second frequency priority information indicates that the priority of the frequency points of the unlicensed frequency band is higher than the priority of the frequency points of the licensed frequency band, performing cell reselection on other cell at the same frequency point or at a different frequency point in the unlicensed frequency band; or

if the second frequency priority information indicates that the priority of the frequency points of the licensed frequency band is higher than the priority of the frequency points of the unlicensed frequency band, performing cell reselection on other cell at the same frequency point or at the different frequency point in the licensed frequency band.

9. A terminal device, comprising a memory, a processor, an input interface, and an output interface, wherein the memory is configured to store instructions, and the processor is configured to execute the instructions stored in the memory, and the terminal device is configured to:

search for a target frequency point according to at least one of pre-configured first configuration information, second configuration information configured by a network device through dynamic signaling, and a working mode set by a user; and

perform, according to a situation of cells at the target frequency point, cell selection or cell reselection;

wherein the first configuration information comprises information of a first frequency point set and/or first frequency priority information, and the second configuration information comprises information of a second frequency point set and/or second frequency priority information; and

wherein the terminal device is further configured to:

if the user sets the working mode to indicate to perform cell selection or cell reselection only in an unlicensed frequency band, determine, among the first frequency point set or the second frequency point set, a frequency point inside the unlicensed frequency band, as the target frequency point, and search for the target frequency point; or

if the user does not set the working mode to indicate to perform cell selection or reselection only in an unlicensed frequency band, determine a frequency point among frequency points inside unlicensed frequency band and licensed frequency band as the target frequency point, wherein the frequency points belong to the first frequency point set or the second frequency point set, and perform searching by searching for the target frequency point.

10. The terminal device according to claim 9 , wherein the second frequency priority information is determined by the network device according to at least one of the capability of the terminal device, the subscription information and the reference of the terminal device and is configured to the terminal device through the dynamic signaling.

11. The terminal device according to claim 9 , wherein the second frequency priority information has a priority higher than a priority of the first frequency priority information, and the working mode set by the user has a priority higher than the first configuration information and the second configuration information.

12. The terminal device according to claim 9 , wherein the first frequency priority information is used to indicate a priority order of the frequency points of the licensed frequency band and the unlicensed frequency band, and the terminal device is configured to:

if the priority of the frequency points of the unlicensed frequency band is higher than the priority of the frequency points of the licensed frequency band, preferentially determine, among the first frequency point set, the frequency point inside the unlicensed frequency band, as the target frequency point, and search for the target frequency point; or

if the priority of the frequency points of the licensed frequency band is higher than the priority of the frequency points of the unlicensed frequency band, preferentially determine, among the first frequency point set, the frequency point inside the licensed frequency band, as the target frequency point, and search for the target frequency point.

13. The terminal device according to claim 9 , wherein the second frequency priority information is used to indicate a priority order of the frequency points of the licensed frequency band and the unlicensed frequency band, and the terminal device is configured to:

if the priority of the frequency points of the unlicensed frequency band is higher than the priority of the frequency points of the licensed frequency band, preferentially determine, among the second frequency point set, the frequency point inside the unlicensed frequency band, as the target frequency point, and search for the target frequency point; or

if the priority of the frequency points of the licensed frequency band is higher than the priority of the frequency points of the unlicensed frequency band, preferentially determine, among the second frequency point set, the frequency point inside the licensed frequency band, as the target frequency point, and search for the target frequency point.

14. The terminal device according to claim 9 , wherein the terminal device is configured to:

a communication module configured to receive a master information block MIB of a first cell corresponding to the target frequency point, wherein the MIB comprises indication information, and the indication information is used to indicate whether the first cell supports a primary cell function; and

perform cell selection or cell reselection according to the indication information.

15. The terminal device according to claim 14 , wherein the terminal device is configured to:

if the indication information indicates that the first cell supports the primary cell function, determine whether to camp on the first cell according to a signal quality of the first cell; or

if the indication information indicates that the first cell does not support the primary cell function, determine not to camp on the first cell.