User equipment and data transmission method thereof
AssigneeSpreadtrum Communications (Shanghai) Co., Ltd.
InventorYang Liu
Life of this patent
Estimating the term…
Abstract
A UE and a data transmission method thereof are provided. The method includes: acquiring configuration information of a first shortened TTI sent by a base station; blindly detecting a predetermined physical downlink link control channel with a period of the first shortened TTI, until primary DCI corresponding to the UE is acquired; determining secondary DCI corresponding to the UE based on the acquired primary DCI; and performing data transmission with the base station in a second shortened TTI scheduled by the secondary DCI. Flexibility of application of a shortened TTI may be improved, and resources may be saved.
Claims16
A data transmission method of a User Equipment (UE), comprising:
- acquiring first configuration information of a first shortened Transmission Time Interval (TTI) sent by a base station;
- blindly detecting a predetermined physical downlink link control channel with a period of the first shortened TTI, until primary Downlink Control Information (DCI) corresponding to the UE is acquired, wherein the primary DCI comprises third configuration information of an exit frame number;
- determining secondary DCI corresponding to the UE based on the primary DCI, wherein the secondary DCI comprises an exit indicator;
- and
- performing data transmission with the base station in a second shortened TTI scheduled by the secondary DCI,
- when a frame number of transmitted data does not exceed the exit frame number and the exit indicator is detected to be valid, blindly detecting the predetermined physical downlink link control channel again to acquire next primary DCI corresponding to the UE;
- and
- when the frame number of transmitted data exceeds the exit frame number, starting to blindly detect the predetermined physical downlink link control channel again from a next shortened TTI to acquire next primary DCI.
A User Equipment (UE), comprising:
- a configuration acquiring circuitry adapted to acquire first configuration information of a first shortened Transmission Time Interval (TTI) sent by a base station;
- a blindly detecting circuitry adapted to blindly detect a predetermined physical downlink link control channel with a period of the first shortened TTI, until primary Downlink Control Information (DCI) corresponding to the UE is acquired, wherein the primary DCI comprises third configuration information of an exit frame number;
- a secondary DCI determining circuitry adapted to determine secondary DCI corresponding to the UE based on the primary DCI, wherein the secondary DCI comprises an exit indicator;
- and
- a transmission circuitry adapted to perform data transmission with the base station in a second shortened TTI scheduled by the secondary DCI,
- wherein when a frame number of transmitted data does not exceed the exit frame number and the exit indicator is detected to be valid, the blindly detecting circuitry blindly detects the predetermined physical downlink link control channel again to acquire next primary DCI corresponding to the UE;
- and
- wherein when the frame number of transmitted data exceeds the exit frame number, the blindly detecting circuitry starts to blindly detect the predetermined physical downlink link control channel again from a next shortened TTI to acquire next primary DCI.
Dependencies are inferred from the claim text.