Uplink information sending method and apparatus, downlink information sending method and apparatus, downlink information receiving method and apparatus and system scheduling method and apparatus
摘要
說明書
Specifically, the base station 10 delivers one piece of DCI at a fixed time interval (referred to as a DCI interval). The DCI includes at least one UE that is possibly be scheduled in a next time period and scheduling information of the at least one UE. Each UE in the communications system may know, by receiving and decoding DCI, whether the UE is scheduled, and perform a corresponding operation according to scheduling information carried in the DCI. The following uses the UE 11 in
Before the base station 10 sends downlink data to the UE 11, scheduling information carried in DCI sent by the base station 10 to the UE 11 includes downlink scheduling information of the UE 11. The downlink scheduling information is indication information required by the UE 11 for receiving the downlink data sent by the base station.
After receiving the downlink data sent by the base station 10, the UE 11 sends uplink information to the base station 10. The uplink information is used to indicate whether the UE 11 correctly receives the downlink data sent by the base station 10. For example, the uplink information may be an ACK (acknowledgement) or NACK (Negative ACK). In the communications system of the present embodiments, both the downlink data sent by the base station to the UE and the uplink information sent by the UE to the base station are sent by using a MAC (Media Access Control) PDU (Protocol Data Unit). The MAC PDU is a basic data unit transmitted at a MAC layer.
