| 主权项 |
1. A method comprising:
transmitting, by a base station to a User Equipment (UE) communicating with the base station through a Primary Cell (PCell) using either Frequency Division Duplexing (FDD) or Time Division Duplexing (TDD),
configuration information for communication with a Secondary Cell (SCell), whereinthe SCell uses TDD if the PCell uses FDD, andthe SCell uses FDD and if the PCell uses TDD,signaling indicating a TDD UpLink-DownLink (UL-DL) configuration for the cell using TDD, wherein a TDD UL-DL configuration is defined over a time period of ten Transmission Time Intervals (TTIs) that comprise DL TTIs where a communication direction is from the base station to the UE, UL TTIs where a communication direction is from the UE to the base station, and special TTIs where a communication direction can be both from the base station to the UE and from the UE to the base station, and wherein each TTI of the ten TTIs has a unique time domain index,one or more Physical DL Control CHannels (PDCCHs) conveying respective one or more DCI formats, wherein each of the one or more DCI formats schedules to the UE a Physical DL Shared CHannel (PDSCH) transmission or a Semi-Persistently Scheduled (SPS) PDSCH release in the PCell or a PDSCH transmission in the SCell; wherein in response to receiving the configuration information, the signaling and at least one DCI format from the one or more DCI formats, the UE determines an UL TTI in the PCell to transmit acknowledgement information, wherein:
if the PCell uses FDD, the acknowledgement information is in response to one reception of PDSCH or SPS PDSCH release in the PCell or in response to one reception of PDSCH in the SCell, in only one TTI, wherein;
if the only one TTI is not an UL TTI in the SCell, the acknowledgement information is in response to a reception of a PDSCH or SPS PDSCH release in the PCell and in a response to a reception of a PDSCH in the SCell, including no reception in either the PCell or in the SCell; andif the only one TTI is an UL TTI in the SCell, the acknowledgement information is in response only to a reception of a PDSCH or SPS PDSCH release in the PCell; andif the PCell uses TDD, the acknowledgement information is in response to at least one reception of a PDSCH or SPS PDSCH release in one of MTDD TTIs in the PCell or of a PDSCH in one of MFDD TTIs in the SCell, wherein MTDD or MFDD is a number of TTIs in the PCell or the SCell, respectively, for which acknowledgement information is transmitted in the UL TTI and MTDD is smaller than or equal to MFDD. |
