| 摘要 |
The present invention relates to an uplink information sending method and apparatus, receiving method and apparatus, and communications system. The uplink information sending method includes: receiving downlink control information DCI and a time division duplexing TDD uplink-downlink configuration that are sent by a base station; determining, according to the TDD uplink-downlink configuration, that an uplink index UL Index field or a downlink assignment index DAI field exists in the DCI, where the TDD uplink-downlink configuration includes a configuration in a physical downlink control channel PDCCH or an uplink reference configuration; and sending uplink information corresponding to the DCI to the base station according to the UL Index field that exists and in an uplink subframe corresponding to the UL Index field that exists; or sending HARQ-ACK information corresponding to the DAI field that exists to the base station according to the DAI field that exists. The present invention can ensure that the UL Index field or the DAI field functions normally, and further can reduce an increase in downlink control signaling overheads or uplink control signaling overheads and improve a system capacity. |
