Method and apparatus of uplink scheduling and HARQ timing

摘要

The present disclosure relates to an apparatus and method for controlling an uplink (UL) scheduling and Hybrid Automatic Repeat reQuest (HARQ) timing supported in a TDD-FDD CA environment. The method includes receiving, on a first serving cell, at least one of a first UL grant and a first Physical HARQ Indicator Channel (PHICH) about a second serving cell through a cross-carrier scheduling, and receiving, on the second serving cell, at least one of a second UL grant and a second PHICH about the second serving cell through a self scheduling. According to aspects of the present invention, in a TDD-FDD carrier aggregation deployment environment, an efficient UL scheduling/HARQ operation may be performed for a UE in which a cross-carrier scheduling is configured. Further, in order to satisfy high data rate required by a UE, data transmission efficiency may be enhanced in accordance with the purpose of carrier aggregation (or dual connectivity).

主权项

1. A User Equipment (UE) to transmit an uplink channel, the UE supporting a cross-carrier scheduling between a Frequency Division Duplex (FDD) cell and a Time Division Duplex (TDD) cell, the UE comprising:
a transmitter; a receiver to receive cross-carrier scheduling information; and a processor configured to determine, for the cross-carrier scheduling between the FDD cell and the TDD cell, an uplink (UL) reference configuration indicating an interval k1 between a UL grant transmission and a Physical Uplink Shared Channel (PUSCH) transmission and an interval k2 between the PUSCH transmission and a Physical Hybrid Automatic Repeat reQuest Indicator Channel (PHICH) transmission, wherein a TDD uplink/downlink configuration of the TDD cell is the UL reference configuration when the FDD cell is a scheduling cell and the TDDcell is a scheduled cell, wherein the receiver receives a UL grant through the FDD cell, the UL grant being transmitted in a first subframe of the FDD cell, wherein the transmitter transmits a PUSCH associated with the UL grant through the TDD cell, the PUSCH being transmitted in a second subframe of the TDD cell, wherein the receiver receives a PHICH associated with the PUSCH through the FDD cell, the PHICH being transmitted in a third subframe of the FDD cell, wherein the cross-carrier scheduling comprises at least one of a downlink cross-carrier scheduling and an uplink cross-carrier scheduling, wherein Physical Downlink Control Channel (PDCCH) and Physical Downlink Shared Channel (PDSCH) are transmitted through different downlink carriers in the downlink cross-carrier scheduling, and wherein a downlink carrier in which PDCCH having a first UL grant is transmitted is different from a downlink carrier linked with an uplink carrier in which PUSCH associated with the first UL grant is transmitted.