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Control information transmission method and apparatus

專利號
US11197281B2
公開日期
2021-12-07
申請人
HUAWEI TECHNOLOGIES CO., LTD（CN Shenzhen）
發(fā)明人
Jian Wang; Jun Wang; Rong Li; Huazi Zhang; Chaolong Zhang
IPC分類
H04L1/00; H04W72/04
技術(shù)領(lǐng)域
dci,codeword,feedback,equipment,in,user,pieces,coding,polar,crc
地域： Shenzhen

摘要

Embodiments of the present invention provide a control information transmission method and apparatus. The control information transmission method includes: determining, by a network device, N pieces of to-be-jointly-coded downlink control information DCI, where N is an integer greater than or equal to 2; coding, by the network device, the N pieces of DCI in a polar coding manner, to obtain one codeword; and mapping, by the network device, the codeword to a time-frequency resource of a downlink control channel for sending. According to the embodiments of the present invention, not only a relatively high coding gain can be obtained, but a relatively low average processing latency on a decoder side can also be obtained.

說明書

Optionally, each piece of DCI includes a CRC field scrambled by using a preset identifier (for example, a user equipment ID) corresponding to user equipment of the DCI. When performing sequential polar code decoding on the to-be-decoded information, the user equipment descrambles a CRC of each segment of decoded DCI by using the preset identifier corresponding to the user equipment, checks an information part of the DCI by using a descrambled CRC, and if the check passes, the user equipment stops decoding, and performs a next operation based on DCI content.

As shown in FIG. 4, when the user equipment decodes the to-be-decoded information, the user equipment exits decoding when decoding DCI that belongs to the user equipment. As shown in the figure, when the to-be-decoded information is being sequentially decoded, user equipment of the DCI 1 exits first, and then user equipment of the DCI 2 succeeds in decoding and exits, and finally, user equipment of the DCI 3 succeeds in decoding and exits.

When the user equipment checks the information part of the DCI by using the CRC descrambled by using the preset identifier corresponding to the user equipment, if the check fails, the user equipment continues to decode a following piece of DCI, descrambles a CRC of the DCI by using the preset identifier corresponding to the user equipment again, and checks an information part of the DCI by using a descrambled CRC until decoding succeeds and the DCI of the user equipment is obtained, or until the entire codeword is decoded. As shown in FIG. 4, when the user equipment of the DCI 2 is decoding the DCI 1, because the DCI 1 is not the DCI of the user equipment, a case in which verification fails occurs.

權(quán)利要求

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