| 摘要 |
The present invention relates to a downlink information sending method and receiving method, a base station, and user equipment. The sending method includes: allocating a cell radio network temporary identifier C-RNTI and an extension identifier to first user equipment UE, where a combination of the extension identifier and the C-RNTI is used to identify the first UE; notifying the first UE of the C-RNTI and the extension identifier; scrambling downlink control information DCI of the first UE by using the C-RNTI; and sending the scrambled DCI, where the scrambled DCI carries the C-RNTI and the extension identifier, so that the first UE communicates with a network according to the DCI when determining that the notified C-RNTI and the C-RNTI in the scrambled DCI are the same and the notified extension identifier and the extension identifier carried in the DCI are the same; or sending a Medium Access Control control element MAC CE and the scrambled DCI, where the MAC CE carries the extension identifier, so that the first UE communicates with a network according to the DCI when determining that the notified C-RNTI and the C-RNTI in the scrambled DCI are the same and the notified extension identifier and the extension identifier carried in the MAC CE are the same. UE is identified by using a combination of a C-RNTI and an extension identifier, to achieve an objective of distinguishing the UE. Compared with the prior art in which UE is distinguished by using a C-RNTI, more UEs can be distinguished, and a problem that an existing C-RNTI cannot satisfy a requirement for distinguishing UEs of highly dense users is resolved. Therefore, a problem that C-RNTIs in a cellular communications system are insufficient is resolved, so that a capacity of a wireless communications network can be expanded to accommodate more users. |
