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|1. (WO2018040674) UPLINK TRANSMISSION METHOD, DOWNLINK TRANSMISSION METHOD, USER EQUIPMENT AND BASE STATION|
|Applicants:||HUAWEI TECHNOLOGIES CO., LTD.
|Title:||UPLINK TRANSMISSION METHOD, DOWNLINK TRANSMISSION METHOD, USER EQUIPMENT AND BASE STATION|
Embodiments of the present invention relate to the technical field of communications, particularly to an uplink transmission method, a downlink transmission method, user equipment and a base station. The uplink transmission method comprises: user equipment receiving a downlink symbol and determining the time of receiving the downlink symbol; and the user equipment determining the time of transmitting an uplink symbol according to the time of receiving the downlink symbol, wherein a difference between the time of transmitting the uplink symbol and the time of receiving the downlink symbol is a constant value, and the length of a cyclic prefix of the uplink symbol is determined according to a maximum bi-directional transmission delay period. With the solution provided by the embodiments of the present invention, user equipment can determine by itself an uplink time advance (TA) value, and a base station is not required to individually configure uplink TA variances for different user equipment units, reducing the signaling overhead as well as the complexity of a base station.