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US 11,146,377 B2Granted
Method and apparatus for communicating in a wireless communication system
AssigneeSamung Electronics Co., Ltd.
InventorsAshok Kumar Reddy Chavva, Anusha Gunturu, Sripada Kadambar
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Abstract
The embodiments herein provide methods and systems for implementing time division duplex (TDD) operations in a narrowband internet of things (NB-IoT) to enable cellular IoT operations in user equipment (UE). A method includes receiving TDD uplink-downlink (UL-DL) configuration and transmitting a predetermined number of a symbol group for a random access in one or more UL subframes based on the received TDD UL-DL configuration, each symbol group including a plurality of symbols, wherein at least part of the predetermined number of symbol groups are transmitted discontinuously.
Claims16
A method of a user equipment (UE) in a wireless communication system supporting time division duplex (TDD), the method comprising:
- receiving a system information block for narrowband Internet of Things (NB-IoT) including a bitmap for specifying NB-IoT downlink (DL) subframes for downlink transmission;
- identifying a plurality of NB-IoT DL subframes indicated by the bitmap in the system information block;
- obtaining first DL control information (DCI) for a first hybrid automatic repeat request (HARQ) process and second DCI for a second HARQ process by monitoring a narrowband physical downlink control channel (NPDCCH) on the plurality of NB-IoT DL subframes;
- and
- receiving first DL data for the first HARQ process based on the first DCI, and receiving second DL data for the second HARQ process based on the second DO,
- wherein the receiving of the first DL data comprises identifying a first NB-IoT DL subframe in which the NPDCCH with the first DCI ends, and receiving the first DL data after a predetermined number of NB-IoT DL subframes from among NB-IoT downlink and uplink subframes subsequent to the first NB-IoT DL subframe included in the plurality of NB-IoT DL subframes, and
- wherein the receiving of the second DL data comprises identifying a second NB-IoT DL subframe in which the NPDCCH with the second DCI ends, and receiving the second DL data after a predetermined number of NB-IoT DL subframes from among the NC-IoT downlink and uplink subframes subsequent to second NB-IoT DL subframe included in the plurality of NB-IoT DL subframes.
4 more elements
A method of a base station (BS) in a wireless communication system supporting time division duplex (TDD), the method comprising:
- transmitting, to a user equipment (UE), a system information block for narrowband Internet of Things (NB-IoT) including a bitmap for specifying NB-IoT downlink (DL) subframes for downlink transmission;
- transmitting, to the UE, first DL control information (DCI) for a first hybrid automatic repeat request (HARQ) process and second DCI for a second HARQ process through a narrowband physical downlink control channel (NPDCCH) on the plurality of NB-IoT DL subframes;
- and
- transmitting, to the UE, first DL data for the first HARQ process based on the first DCI, and transmitting, to the UE, second DL data for the second HARQ process based on the second DCI,
- wherein the transmitting of the first DL data comprises identifying a first NB-IoT DL subframe in which the NPDCCH with the first DCI ends, and transmitting, to the UE, the first DL data after a predetermined number of NB-IoT DL subframes from among NB-IoT downlink and uplink subframes subsequent to the first NB-IoT DL subframe included in the plurality of NB-IoT DL subframes, and
- wherein the transmitting of the second DL data comprises identifying a second NB-IoT DL subframe in which the NPDCCH with the second DCI ends, and transmitting, to the UE, the second DL data after a predetermined number of NB-IoT DL subframes from among NB-IoT downlink and uplink subframes subsequent to the second NB-IoT DL subframe included in the plurality of NB-IoT DL subframes.
3 more elements
A user equipment (UE) in a wireless communication system supporting time division duplex (TDD), the UE comprising:
- a transceiver;
- and
- at least one processor configured to:
- control the transceiver to receive a system information block for narrowband Internet of Things (NB-IoT) including a bitmap for specifying NB-IoT downlink (DL) subframes for downlink transmission,
- identify a plurality of NB-IoT DL subframes indicated by the bitmap in the system information block,
- obtain first DL control information (DCI) for a first hybrid automatic repeat request (HARQ) process and second DCI for a second HARQ process by monitoring a narrowband physical downlink control channel (NPDCCH) on the plurality of NB-IoT DL subframes, and control the transceiver to receive first DL data for the first HARQ process based on the first DCI, and receive second DL data for the second HARQ process based on the second DCI,
- wherein the at least one processor is further configured to:
- identify a first NB-IoT DL subframe in which the NPDCCH with the first DCI ends,
- control the transceiver to receive the first DL data after a predetermined number of NB-IoT DL subframes from among NB-IoT downlink and uplink subframes subsequent to the first NB-IoT DL subframe included in the plurality of NB-IoT DL subframes,
- identify a second NB-IoT DL subframe in which the NPDCCH with the second DCI ends, and
- control the transceiver to receive the second DL data after a predetermined number of NB-IoT DL subframes from among NB-IoT downlink and uplink subframes subsequent to the second NB-IoT DL subframe included in the plurality of NB-IoT DL subframes.
8 more elements
A base station (BS) in a wireless communication system supporting time division duplex (TDD), the BS comprising:
- a transceiver;
- and
- at least one processor configured to control the transceiver to:
- transmit, to a user equipment (UE), a system information block for narrowband Internet of Things (NB-IoT) including a bitmap for specifying NB-IoT downlink (DL) subframes for downlink transmission,
- transmit, to the UE, first DL control information (DCI) for a first hybrid automatic repeat request (HARQ) process and second DCI for a second HARQ process through a narrowband physical downlink control channel (NPDCCH) on the plurality of NB-IoT DL subframes, and
- transmit, to the UE, first DL data for the first HARQ process based on the first DCI, and transmit, to the UE, second DL data for the second HARQ process based on the second DCI,
- wherein the at least one processor is further configured to control the transceiver to:
- identify a first NB-IoT DL subframe in which the NPDCCH with the first DCI ends,
- control the transceiver to transmit, to the UE, the first DL data after a predetermined number of NB-IoT DL subframes from among NB-IoT downlink and uplink subframes subsequent to the first NB-IoT DL subframe included in the plurality of NB-IoT DL subframes,
- identify a second NB-IoT DL subframe in which the NPDCCH with the second DCI ends, and
- control the transceiver to transmit, to the UE, the second DL data after a predetermined number of NB-IoT DL subframes from among NB-IoT downlink and uplink subframes subsequent to the second NB-IoT DL subframe included in the plurality of NB-IoT DL subframes.
8 more elements
Dependencies are inferred from the claim text.