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US 10,568,071 B2Granted
Method for transmitting and receiving uplink signal for NB-IoT UE and apparatus therefor
AssigneeKt Corporation
InventorsKyujin Park, Woo-jin Choi
Life of this patent
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Abstract
Provided are a method and apparatus for transmitting an uplink signal by a Narrow Band Internet of things (IoT) UE. The method may include receiving, from a base station, uplink resource allocation information for transmitting HARQ ACK/NACK for downlink data, configuring a time-axis wireless resource and a frequency-axis wireless resource of an uplink signal including the HARQ ACK/NACK, based on the uplink resource allocation information, and transmitting the uplink signal through the time-axis wireless resource and frequency-axis wireless resource.
Claims12
A method for transmitting an uplink signal by a Narrow Band Internet of things (NB-IoT) user equipment (UE), the method comprising:
- receiving, from a base station, uplink resource allocation information for transmitting HARQ ACK/NACK for downlink data;
- configuring a time-axis wireless resource and a frequency-axis wireless resource of an uplink signal including the HARQ ACK/NACK, based on the uplink resource allocation information;
- and
- transmitting the uplink signal through the time-axis wireless resource and frequency-axis wireless resource,
- wherein the uplink resource allocation information includes subcarrier allocation information and sub-frame allocation information which are allocated for the transmission of the HARQ ACK/NACK for the downlink data;
- wherein the sub-frame allocation information includes sub-frame offset information for configuring the time-axis wireless resource of the uplink signal;
- wherein the sub-frame offset information includes a sub-frame offset value to be used to determine a location of an uplink sub-frame for the HARQ ACK/NACK by applying to the last sub-frame of repetitively receiving the downlink data, where the sub-frame offset value is differently allocated according to a subcarrier spacing of the NB-IoT UE,
- wherein the uplink resource allocation information is included in downlink control information which allocates the subcarrier allocation information and the sub-frame allocation information in pairs, and
- wherein the transmitting the uplink signal comprises transmitting the uplink signal including the HARQ ACK/NACK in uplink signal transmission subframe of the time-axis wireless resource which is determined as equation as follows,
- Uplink signal transmission sub-frame for HARQ ACK/NACK=last sub-frame n for NPDSCH repetitive transmission+sub-frame allocation information (Kn)−A, [Equation]
- where the last sub-frame n for NPDSCH repetitive transmission is the last sub-frame of repetitively receiving the downlink data, the sub-frame allocation information (Kn) is the sub-frame offset value, and the A is a predetermined natural number which is configured as 1.
8 more elements
A method for receiving an uplink signal by a base station, the method comprising:
- configuring uplink resource allocation information for receiving HARQ ACK/NACK for downlink data from a Narrow Band Internet of things (NB-IoT) user equipment (UE);
- transmitting the uplink resource allocation information and the downlink data to the NB-IoT UE;
- and
- receiving an uplink signal including the HARQ ACK/NACK through a time-axis wireless resource and a frequency-axis wireless resource, which are configured based on the uplink resource allocation information,
- wherein the uplink resource allocation information includes subcarrier allocation information and sub-frame allocation information which are allocated for the transmission of the HARQ ACK/NACK for the downlink data;
- wherein the sub-frame allocation information includes sub-frame offset information for configuring the time-axis wireless resource of the uplink signal;
- wherein the sub-frame offset information includes a sub-frame offset value to be used to determine a location of an uplink sub-frame for the HARQ ACK/NACK by applying to the last sub-frame of repetitively receiving the downlink data, where the sub-frame offset value is differently allocated according to a subcarrier spacing of the NB-IoT UE,
- wherein the uplink resource allocation information is included in downlink control information which allocates the subcarrier allocation information and the sub-frame allocation information in pairs, and
- wherein the receiving the uplink signal comprises receiving the uplink signal including the HARQ ACK/NACK in uplink signal transmission subframe of the time-axis wireless resource which is determined as equation as follows,
- Uplink signal transmission sub-frame for HARQ ACK/NACK=last sub-frame n for NPDSCH repetitive transmission+Sub-frame allocation information (Kn)−A, [Equation]
- Where the last sub-frame n for NPDSCH repetitive transmission is the last sub-frame of repetitively receiving the downlink data, the Sub-frame allocation information (Kn) is the sub-frame offset value, and the A is predetermined natural number which is configured as 1.
8 more elements
A Narrow Band Internet of things (NB-IoT) user equipment (UE) for transmitting an uplink signal, the NB-IoT UE comprising:
- a receiver configured to receive, from a base station, uplink resource allocation information for transmitting HARQ ACK/NACK for downlink data;
- a controller configured to configure a time-axis wireless resource and a frequency-axis wireless resource of an uplink signal including the HARQ ACK/NACK, based on the uplink resource allocation information;
- and
- a transmitter configured to transmit the uplink signal through the time-axis wireless resource and frequency-axis wireless resource,
- wherein the uplink resource allocation information includes subcarrier allocation information and sub-frame allocation information which are allocated for the transmission of the HARQ ACK/NACK for the downlink data;
- wherein the sub-frame allocation information includes sub-frame offset information for configuring the time-axis wireless resource of the uplink signal;
- wherein the sub-frame offset information includes a sub-frame offset value to be used to determine a location of an uplink sub-frame for the HARQ ACK/NACK by applying to the last sub-frame of repetitively receiving the downlink data, where the sub-frame offset value is differently allocated according to a subcarrier spacing of the NB-IoT UE,
- wherein the uplink resource allocation information is included in downlink control information which allocates the subcarrier allocation information and the sub-frame allocation information in pairs, and
- wherein the transmitter transmits the uplink signal including the HARQ ACK/NACK in uplink signal transmission subframe of the time-axis wireless resource which is determined as equation as follows,
- Uplink signal transmission sub-frame for HARQ ACK/NACK=last sub-frame n for NPDSCH repetitive transmission+Sub-frame allocation information (Kn)−A, [Equation]
- Where the last sub-frame n for NPDSCH repetitive transmission is the last sub-frame of repetitively receiving the downlink data, the Sub-frame allocation information (Kn) is the sub-frame offset value, and the A is a predetermined natural number which is configured as 1.
8 more elements
Dependencies are inferred from the claim text.