US 2015/0092632 A1 · METHOD AND APPARATUS OF UPLINK SCHEDULING AND HARQ TIMING

Abstract

The present invention 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.

Claims12

Dependent claims

A method of transmitting an uplink channel by a User Equipment (UE), the UE supporting a cross-carrier scheduling between a Frequency Division Duplex (FDD) cell and a Time Division Duplex (TDD) cell, the method comprising:

receiving cross-carrier scheduling information;
for a cross-carrier scheduling between a FDD cell and a TDD cell, determining an uplink (UL) reference configuration indicating an interval k1 between a UL grant 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 TDD uplink/downlink configuration of the TDD cell is the UL reference configuration when the FDD cell is a scheduling cell and the TDD cell is a scheduled cell;
receiving a UL grant through the FDD cell, the UL grant being transmitted in a first subframe of the FDD cell;
transmitting, from the UE, a PUSCH associated with the UL grant through the TDD cell, the PUSCH being transmitted in a second subframe of the TDD cell;
and
receiving a PHICH associated with the PUSCH through the FDD cell, the PHICH being transmitted in a third subframe of the FDD cell.

3 more elements

A method of transmitting an acknowledgement/negative acknowledgement (ACK/NACK) for an uplink channel received from a User Equipment (UE), the UE supporting a cross-carrier scheduling between a Frequency Division Duplex (FDD) cell and a Time Division Duplex (TDD) cell, the method comprising:

transmitting, from a base station, cross-carrier scheduling information;
for a cross-carrier scheduling between a FDD cell and a TDD cell, determining an uplink (UL) reference configuration indicating an interval k1 between a UL grant and a Physical Uplink Shared Channel (PUSCH) transmission and an interval kPHICH between the PUSCH transmission and a Physical Hybrid Automatic Repeat reQuest Indicator Channel (PHICH) transmission, wherein TDD uplink/downlink configuration of the TDD cell is the UL reference configuration when the FDD cell is a scheduling cell and the TDD cell is a scheduled cell;
transmitting, from the base station, a UL grant through the FDD cell, the UL grant being transmitted in a first subframe of the FDD cell;
receiving a PUSCH associated with the UL grant through the TDD cell, the PUSCH being transmitted in a second subframe of the TDD cell;
and
transmitting, from the base station, a PHICH associated with the PUSCH through the FDD cell, the PHICH being transmitted in a third subframe of the FDD cell.

3 more elements

Dependencies are inferred from the claim text.

Method and apparatus of uplink scheduling and harq timing

Life of this patent

Method and apparatus of uplink scheduling and harq timing

Life of this patent

Abstract

Claims12