Method for selecting NSA and SA networking mode, and terminal device
A network search method includes presetting, by a terminal device, a Public Land Mobile Network (PLMN) and a networking mode associated with the PLMN, searching, by the terminal device based on a geographical location to obtain PLMN information of a current geographical location, determining, by the terminal device based on the preset PLMN and the networking mode associated with the PLMN, a current networking mode of the terminal device, and switching, by the terminal device, the networking mode based on a geographical location, signal strength, and a system message.
1. A method, implemented by a terminal device, for searching for a network, wherein the method comprises:
obtaining preset information that comprises public land mobile network (PLMN) information and that indicates networking modes associated with the PLMN information, wherein the networking modes comprise a standalone (SA) mode and a non-standalone (NSA) mode;
obtaining the PLMN information from the preset information; and
determining, based on the PLMN information and the preset information, a networking mode of the terminal device.
2. The method of claim 1 , further comprising switching the networking mode from the NSA mode to the SA mode when a first parameter is greater than a first threshold.
3. The method of claim 2 , wherein the first parameter is at least one parameter of a fifth generation (5G) access network and comprises:
a signal quality;
a signal strength;
a transmission rate;
a network registration success rate; or
a packet loss rate.
4. The method of claim 1 , further comprising switching the networking mode from the SA mode to the NSA mode when a first parameter is greater than a first threshold.
5. The method of claim 4 , wherein the first second parameter is at least one parameter of a fourth generation (4G) access network and comprises:
a signal quality;
a signal strength;
a transmission rate;
a network registration success rate; or
a packet loss rate.
6. The method of claim 1 , further comprising:
obtaining a system message comprising a field information element (IE) upper layer indication-R15; and
switching the networking mode to the SA mode.
7. The method of claim 1 , further comprising searching, based on a geographical location, to obtain the PLMN information from broadcast information.
8. The method of claim 1 , further comprising further obtaining the preset information from a storage of the terminal device or from a server.
9. A terminal device, comprising:
a storage medium configured to store instructions; and
a processor coupled to the storage medium, wherein the instructions cause the processor to be configured to:
obtain preset information that comprises Public Land Mobile Network (PLMN) information and that indicates networking modes associated with the PLMN information, wherein the networking modes comprise a standalone (SA) mode and a non-standalone (NSA) mode;
obtain the PLMN information from the preset information; and
determine, based on the PLMN information and the preset information, a networking mode of the terminal device.
10. The terminal device of claim 9 , wherein the instructions further cause the processor to be configured to switch the networking mode from the NSA mode to the SA mode when a first parameter is greater than a first threshold.
11. The terminal device of claim 10 , wherein the first parameter is at least one parameter of a fifth generation (5G) access network and comprises:
a signal quality;
a signal strength;
a transmission rate;
a network registration success rate; or
a packet loss rate.
12. The terminal device of claim 9 , wherein the instructions further cause the processor to be configured to switch the networking mode from the SA mode to the NSA mode when a first parameter is greater than a first threshold.
13. The terminal device of claim 12 , wherein the first parameter is at least one parameter of a fourth generation (4G) access network and comprises:
a signal quality;
a signal strength;
a transmission rate;
a network registration success rate; or
a packet loss rate.
14. The terminal device of claim 9 , wherein the instructions further cause the processor to be configured to:
obtain a system message comprising a field information element (IE) upper layer indication-R15; and
switch the networking mode to the SA mode.
15. The terminal device of claim 9 , wherein the instructions further cause the processor to be configured to search, based on a geographical location, to obtain the PLMN information from broadcast information.
16. The terminal device of claim 9 , wherein the instructions further cause the processor to be configured to obtain the preset information from a storage of the terminal device or from a server.
17. A computer program product comprising instructions stored on a non-transitory computer-readable medium that, when executed by a processor, cause a terminal device to:
obtain preset information that comprises Public Land Mobile Network (PLMN) information and that indicates networking modes associated with the PLMN information, wherein the networking modes comprise a standalone (SA) mode and a non-standalone (NSA) mode;
obtain the PLMN information from the preset information; and
determine, based on the PLMN information and the preset information, a networking mode of the terminal device.
18. The computer program product of claim 17 , wherein the instructions further cause the terminal device to switch the networking mode from the NSA mode to the SA mode when a first parameter is greater than a first threshold.
19. The computer program product of claim 17 , wherein the instructions further cause the terminal device to switch the networking mode from the SA mode to the NSA mode when a first parameter is greater than a first threshold.
20. The computer program product of claim 17 , wherein the instructions further cause the terminal device to search, based on a geographical location, to obtain the PLMN information from broadcast information.