| CPC H04L 5/0048 (2013.01) | 15 Claims |

|
1. An information transmission method, comprising:
determining, by a communication device, a second signal according to N bits in first information, wherein the second signal comprises at least one of a preamble and a Reference Signal (RS), and N is an integer greater than or equal to 1; and
sending, by the communication device, a message A comprising the second signal and a third signal;
wherein the third signal is obtained based on an extension block Z, the extension block Z is generated by encoding and modulating the remaining bits after removing N bits from the first information to obtain a modulation symbol Q, and then expanding the modulation symbol Q;
wherein the first information comprises at least one of: identity information of the communication device, uplink control information, and downlink beam information captured by the communication device,
wherein determining the second signal according to the N bits in the first information comprises: determining an index of a preamble sequence in a sequence pool according to the N bits in the first information, and determining the preamble according to the index.
|