Method and device of determining scheduling of shortened subframes

A method for receiving control information by a user equipment (UE) in a communication system, the method comprising:

• receiving, from a base station, higher layer signaling configuring a resource of a first physical downlink control channel (PDCCH) to be used to schedule data transmission in a unit of shortened transmission time interval (TTI), the higher layer signaling comprising first information indicating which one of a demodulation reference signal (DMRS)-based demodulation or a non-DMRS-based demodulation is used for the first PDCCH;
• receiving, on the first PDCCH, from the base station, control information which a physical downlink shared channel (PDSCH) in a shortened TTI of a TTI, based on the higher layer signaling;
• and
• receiving, from the base station, the PDSCH in the shortened TTI of the TTI, based on the control information,
• wherein the TTI includes multiple shortened TTIs, and
• wherein a firstly located shortened TTI of the multiple shortened TTIs within the TTI is scheduled by a second PDCCH, the second PDCCH transmitted by the base station for scheduling data transmission in a unit of TTI, and
• wherein remaining shortened TTI except the firstly located shortened TTI within the TTI is scheduled by the first PDCCH.

A base station for transmitting control information in a communication system, the base station comprising:

• a transceiver;
• a processor coupled to the transceiver;
• and
• a memory, coupled to the processor, the memory storing one or more computer programs configured to be executed by the processor, the one or more computer programs including instructions for:
• transmitting, to a user equipment (UE), higher layer signaling configuring a resource of a first physical downlink control channel (PDCCH) to be used to schedule data transmission in a unit of shortened transmission time interval (TTI), the higher layer signaling comprising first information indicating which one of a demodulation reference signal (DMRS)-based demodulation or a non-DMRS-based demodulation is used for the first PDCCH,
• transmitting, on the first PDCCH, to the UE, control information which schedules a physical downlink shared channel (PDSCH) in a shortened TTI of a TTI, based on the higher layer signaling, and
• transmitting, to the UE, the PDSCH in the shortened TTI of the TTI, based on the control information,
• wherein the TTI includes multiple shortened TTIs,
• wherein a firstly located shortened TTI of the multiple shortened TTIs within the TTI is scheduled by a second PDCCH, the second PDCCH transmitted by the base station for scheduling data transmission in a unit of TTI, and
• wherein remaining shortened TTI except the firstly located shortened TTI within the TTI is scheduled by the first PDCCH.

A user equipment (UE) for receiving control information in a communication system, the UE comprising:

• a transceiver;
• and
• a processor coupled to the transceiver;
• and
• a memory, coupled to the processor, the memory storing one or more computer programs configured to be executed by the processor, the one or more computer programs including instructions for:
• receiving, from a base station, higher layer signaling configuring a resource of a first physical downlink control channel (PDCCH) to be used to schedule data transmission in a unit of shortened transmission time interval (TTI), the higher layer signaling comprising first information indicating which one of a demodulation reference signal (DMRS)-based demodulation or a non-DMRS-based demodulation is used for the first PDCCH,
• receiving, on the first PDCCH, from the base station, control information which a physical downlink shared channel (PDSCH) in a shortened TTI of a TTI, based on the higher layer signaling, and
• receiving, from the base station, the PDSCH in the shortened TTI of the TTI, based on the control information,
• wherein the TTI includes multiple shortened TTIs, and
• wherein a firstly located shortened TTI of the multiple shortened TTIs within the TTI is scheduled by a second PDCCH, the second PDCCH transmitted by the base station for scheduling data transmission in a unit of TTI, and
• wherein remaining shortened TTI except the firstly located shortened TTI within the TTI is scheduled by the first PDCCH.