Random access method and apparatus, and communication device

A terminal device, comprising:

• at least one processor;
• and
• a non-transitory memory coupled to the at least one processor and configured to store programming instructions that, when executed by the at least one processor, cause the terminal device to:
• receive supplementary uplink (SUL) configuration information, wherein the SUL configuration information comprises a plurality of SULs, a plurality of supplementary downlink (SDL)s respectively matching the plurality of SULs, and SDL measurement configuration information;
• measure reference signal strength of the plurality of SDLs based on the SDL measurement configuration information;
• select at least one first SDL from the plurality of SDLs based on the reference signal strength of the plurality of SDLs, and selecting a second SDL from the at least one first SDL, wherein the second SDL has highest reference signal strength in the at least one first SDL;
• and
• initiate random access over an SUL corresponding to the second SDL.

A base station device, comprising:

• at least one processor;
• and
• a non-transitory memory coupled to the at least one processor and configured to store programming instructions that, when executed by the at least one processor, cause the base station device to:
• send supplementary uplink (SUL) configuration information, wherein the SUL configuration information comprises a plurality of SULs, a plurality of supplementary downlink (SDL)s respectively matching the plurality of SULs, and SDL measurement configuration information, so that user equipment UE measures reference signal strength of the plurality of SDLs based on the SDL measurement configuration information, and initiates random access over an SUL corresponding to a second SDL, wherein the second SDL has highest reference signal strength in at least one first SDL, and the at least one first SDL is selected by the UE from the plurality of SDLs based on the reference signal strength of the plurality of SDLs.

A nonvolatile computer-readable storage medium, storing computer program instructions, wherein when the computer program instructions are executed by a processor, cause a device to:

• receive supplementary uplink (SUL) configuration information, wherein the SUL configuration information comprises a plurality of SULs, a plurality of supplementary downlink (SDL)s respectively matching the plurality of SULs, and SDL measurement configuration information;
• measure reference signal strength of the plurality of SDLs based on the SDL measurement configuration information;
• select at least one first SDL from the plurality of SDLs based on the reference signal strength of the plurality of SDLs, and selecting a second SDL from the at least one first SDL, wherein the second SDL has highest reference signal strength in the at least one first SDL;
• and
• initiate random access over an SUL corresponding to the second SDL.