Information transmission method and apparatus in tdd system

A method for information transmission in a system, comprising:

• determining, by an information transmission apparatus, a frame structure used for information transmission in a time division duplex TDD system, wherein each frame based on the frame structure comprises N subframes with a timing length of K subframes, and one super frame comprises M consecutive subframes;
• and
• sending and/or receiving, by the information transmission apparatus, a message based on the frame structure, wherein
• N, K, and M are positive integers, M is a common multiple of N and 2K, each super frame comprises at least one downlink-only subframe, and further comprises at least one of an uplink-only subframe, a type-1 subframe, or a type-2 subframe, the downlink-only subframe comprises downlink symbols and no uplink symbol, the type-1 subframe comprises at least one uplink symbol and at least one downlink symbol, and a quantity of uplink symbols is less than that of downlink symbols, the type-2 subframe comprises at least one uplink symbol and at least one downlink symbol, and a quantity of uplink symbols is greater than that of downlink symbols, and the uplink-only subframe comprises uplink symbol and no downlink symbol.

An information transmission apparatus, comprising:

• a memory to store instructions;
• a processor in communication with the memory to execute the instructions to determine a frame structure used for information transmission in a time division duplex TDD system, wherein each frame based on the frame structure comprises N subframes with a timing length of K subframes, and one super frame comprises M consecutive subframes;
• a transmitter in communication with the processor to send a message in the TDD system based on the frame structure;
• and
• a receiver in communication with the processor to receive the message in the TDD system based on the frame structure, wherein
• N, K, and M are positive integers, M is a common multiple of N and 2K, each super frame comprises at least one downlink-only subframe, and further comprises at least one of an uplink-only subframe, a type-1 subframe, or a type-2 subframe, the downlink-only subframe comprises downlink symbols and no uplink symbol, the type-1 subframe comprises at least one uplink symbol and at least one downlink symbol, and a quantity of uplink symbols is less than that of downlink symbols, the type-2 subframe comprises at least one uplink symbol and at least one downlink symbol, and a quantity of uplink symbols is greater than that of downlink symbols, and the uplink-only subframe comprises uplink symbols but no downlink symbol.