Beam indication method, terminal, network-side device, and storage medium

A terminal comprising:

• a memory, a transceiver, and a processor,
• wherein the memory is configured to store computer programs, the transceiver is configured to send and receive data under a control of the processor, and the processor is configured to read the computer programs stored in the memory to perform the following operations:
• receiving a beam indication message from a base station, wherein the beam indication message comprises a first TCI state ID;
• obtaining a first TCI state corresponding to the first TCI state ID from a TCI state pool, wherein an information field of the first TCI state at most comprises two groups of source reference signal information for indicating beam directions;
• and
• determining a beam direction corresponding to an uplink channel and/or a downlink channel based on the source reference signal information for indicating beam directions.

A network-side device comprising:

• a memory, a transceiver and a processor,
• wherein the memory is configured to store computer programs, the transceiver is configured to send and receive data under a control of the processor, and the processor is configured to read the computer programs stored in the memory to perform the following operations:
• determining a first TCI state, wherein an information field of the first TCI state at most comprises two groups of source reference signal information for indicating beam directions;
• and
• sending a beam indication message to a terminal, wherein the beam indication message comprises a first TCI state ID.