Method for transmitting uplink channel and nb-iot device

Patent metadata

Field	Value
Publication number	US-2018145802-A1
Application number	US-201615579421-A
Country	US
Kind code	A1
Filing date	Jun 13, 2016
Priority date	Jun 22, 2015
Publication date	May 24, 2018
Grant date	—

Abstract

The disclosure of the present specification provides a method in which a narrowband-Internet of things (NB-IoT) device transmits an uplink channel. The method comprises: determining an uplink subcarrier spacing for transmitting an uplink channel; determining the length of a subframe on the basis of the subcarrier spacing; and transmitting the uplink channel in a subframe having the determined length. The last part of the subframe may be excluded from the transmission of the uplink channel.

First claim

What is claimed is:

1 . A method for transmitting an uplink channel, the method performed by a narrowband-internet of things (NB-IoT) device and comprising:
determining an uplink subcarrier spacing for transmitting the uplink channel; determining a subframe length based on the uplink subcarrier spacing; transmitting the uplink channel on a subframe having the determined length, wherein a last portion of the subframe is excepted for transmitting the uplink channel.

2 . The method of claim 1 , wherein the subcarrier spacing is determined to be 3.75 kHz or 15 kHz.

3 . The method of claim 2 , wherein when the subcarrier spacing is 3.75 kHz, the subframe length is determined to be 2 ms; or
when the subcarrier spacing is 15 kHz, the subframe length is determined to be 1 ms.

4 . The method of claim 1 , wherein the last portion is excluded for transmission of the uplink channel only when the last portion is overlapped with a temporal resource used for transmission of a sounding reference signal (SRS) by a LTE-based UE adjacent to the NB IoT device.

5 . The method of claim 4 , wherein the last portion is excluded for transmission of the uplink channel to secure the SRS transmission by the LTE-based UE.

6 . The method of claim 4 , further comprising:
receiving information on the SRS from a cell to which the LTE-based UE belongs.

7 . A narrowband-internet of things (NB-IoT) device configured for transmitting an uplink channel, the device comprising:
a transmission and reception unit configured to transmit and receive a radio signal; and a processor connected to the unit, wherein the processor is configured for: determining a spacing between uplink subcarriers used for transmitting the uplink channel; determining a subframe length based on the uplink subcarrier spacing; controlling the transmission and reception unit to transmit the uplink channel on a subframe having the determined length, wherein a last portion of the subframe is excepted for transmitting the uplink channel.

8 . The device of claim 7 , wherein the subcarrier spacing is determined to be 3.75 kHz or 15 kHz.

9 . The device of claim 8 , wherein when the subcarrier spacing is 3.75 kHz, the subframe length is determined to be 2 ms; or when the subcarrier spacing is 15 kHz, the subframe length is determined to be 1 ms.

10 . The device of claim 7 , wherein the last portion is excluded for transmission of the uplink channel only when the last portion is overlapped with a temporal resource used for transmission of a sounding reference signal (SRS) by a LTE-based UE adjacent to the NB IoT device.

11 . The device of claim 10 , wherein the last portion is excluded for transmission of the uplink channel to secure the SRS transmission by the LTE-based UE.

12 . The device of claim 10 , wherein the processor is further configured to control the transmission and reception unit to receive information on the SRS from a cell to which the LTE-based UE belongs.

Assignees

• Lg Electronics Inc

Inventors

• Hwang Daesung
• Yi Yunjung
• Kim Bonghoe

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04L5/0007 Primary

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W28/26

  Resource reservation · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title