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Control information transmission method and apparatus

專利號(hào)
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

S10: The network device determines N pieces of to-be-jointly-coded downlink control information DCI, where N is an integer greater than or equal to 2.

In this embodiment of the present invention, the network device determines the N pieces of to-be-jointly-coded DCI, and N is an integer greater than or equal to 2. As shown in FIG. 4, the network device determines that DCI 1, DCI 2, and DCI 3 are three pieces of to-be-jointly-coded DCI.

Optionally, as shown in FIG. 5, each piece of DCI includes DCI and a CRC, and the CRC included in the DCI is formed by performing scrambling by using a preset identifier (for example, a user equipment ID) corresponding to user equipment of the DCI. After decoding all DCI bits, the user equipment at a receive end first descrambles the CRC in the DCI by using a preset identifier corresponding to the user equipment, and then checks the DCI in the DCI by using a descrambled CRC. If the check succeeds, it indicates that the DCI is successfully received.

When an error occurs in a DCI decoding process, the CRC check fails. Even if the DCI is correctly decoded, if a CRC part is not descrambled by using a correct user equipment ID, the DCI cannot pass the CRC check. In other words, this mechanism prevents false detection of DCI between different user equipments.

權(quán)利要求

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