WIRELESS COMMUNICATION METHOD AND DEVICE
FIG3 is a schematic flowchart of processing a PDCCH by a network device
Optionally, DCI may be carried by using a physical downlink control channel (Physical Downlink Control Channel, PDCCH). As shown in FIG3, the network device first performs CRC encoding on the to-be-sent DCI to obtain a CRC, then scrambles the CRC with a radio network temporary identifier (Radio Network Temporary Identifier, RNTI) and antenna port information to obtain a scrambled sequence, concatenates the scrambled sequence with the DCI, and performs procedures of channel encoding, modulation, mapping, and sending. The channel encoding in the procedure shown in FIG3 can improve reliability of data transmission to ensure communication quality. A polar code proposed by the Turkish professor, Ankan, is the first code that can be theoretically proved to achieve a Shannon's capacity and that has low encoding and decoding complexity. The polar code is a linear block code. An encoding matrix of the polar code is GN, and an encoding process of the polar code is x1N=u1NGN, where u1N=u1u2KuN is a binary row vector with a length of N (that is, a code length), GN is an N × N matrix, and GN=F2⊗log2N.F2⊗log2N is defined as a Kronecker (Kronecker) product of log2N matrices F2, and the matrix F2=1011.
schematic flowchart
3
scrambled sequence
['1. A wireless communication method, comprising: scrambling, with each piece of configuration information of a plurality of pieces of configuration information used for configuring a terminal device, bits that are comprised in a cyclic redundancy check CRC of downlink control information DCI and that correspond to each piece of configuration information, to obtain a scrambled sequence, wherein at least one bit of bits that correspond to each piece of configuration information does not correspond to another piece of configuration information of the plurality of pieces of configuration information; and sending the DCI and the scrambled sequence to the terminal device.']