Method and system for transmitting and receiving data in narrow band wireless communication system

Patent metadata

Field	Value
Publication number	US-2022015089-A1
Application number	US-201917280801-A
Country	US
Kind code	A1
Filing date	Sep 27, 2019
Priority date	Sep 27, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

Disclosed is a method for transmitting and receiving data between a user equipment (UE) and a base station in a narrowband wireless communication system. Specifically, the method includes transmitting, to the UE, a preconfigured uplink (UL) resource (PUR) configuration via RRC signalling, receiving, from the UE, uplink data on the PUR when the UE is in an idle mode, and transmitting, to the UE, a feedback for the uplink data, wherein the feedback is configured to be transmitted on an NPDCCH after a specific time has passed from the PUR reception.

First claim

1 . A method for transmitting, by a base station, data to a user equipment (UE) in a narrowband (NB) wireless communication system, the method comprising:
transmitting, to the UE, a paging message based on the information related to DRX, receiving, from the UE, a Physical Random Access Channel, PRACH, preamble based on the paging message, transmitting, to the UE, a random access response including Uplink, UL, grant based on the PRACH preamble, receiving, from the UE, message 3 based on the UL grant,
transmitting, to the UE, a message for contention resolution based on the message 3,
transmitting, to the UE, a preconfigured uplink (UL) resource (PUR) configuration via RRC signalling;
when the UE is in an idle mode, receiving, from the UE, uplink data on the PUR; and
transmitting, to the UE, a feedback for the uplink data,
wherein the feedback is configured to be transmitted on an NPDCCH after a specific time has passed from the PUR reception.

2 . The method of claim 1 , wherein the specific time is a specific number of at least one subframe.

3 . The method of claim 2 , wherein the specific number is four.

4 . The method of claim 1 , further comprising:
monitoring a feedback window on a search space for transmitting the feedback; and indicating, to the UE, stopping the monitoring based on whether or not DCI including the feedback is received on the feedback window.

5 . The method of claim 1 , further comprising:
configuring to transmit, to the UE, a response on other second field excluding a first field required to indicate a PUR retransmission from a plurality of fields included in a UL grant.

6 . A method for receiving, by a user equipment (UE), data from a base station in a narrowband (NB) wireless communication system, the method comprising:
receiving, from the base station, a paging message,
transmitting, to the base station, a Physical Random Access Channel, PRACH, preamble based on the paging message,
receiving, from the base station, a random access response including Uplink, UL, grant based on the PRACH preamble,
transmitting, to the base station, message 3 based on the UL grant,
receiving, from the base station, a message for contention resolution based on the message 3,
receiving, from the base station, a preconfigured uplink (UL) resource (PUR) configuration via RRC signalling;
transmitting, to the base station, uplink data on the PUR; and
when the UE is in an idle mode, receiving, from the base station, a feedback for the uplink data,
wherein the feedback is configured to be received on an NPDCCH after a specific time has passed from the PUR transmission.

7 . The method of claim 6 , wherein the specific time is a specific number of at least one subframe.

8 . The method of claim 7 , wherein the specific number is four.

9 . The method of claim 6 , further comprising:
monitoring a feedback window on a search space for receiving the feedback; and stopping the monitoring based on whether or not DCI including the feedback is received on the feedback window.

10 . The method of claim 6 , further comprising:
configuring to receive, from the base station, a response on other second field excluding a first field required to indicate a PUR retransmission from a plurality of fields included in a UL grant.

11 . A base station transmitting data to a user equipment (UE) in a narrowband (NB) wireless communication system, the base station comprising:
a radio frequency (RF) module configured to transmit and receive a radio signal; and a processor functionally connected to the RF module, wherein the processor is configured to: transmit, to the UE, a paging message based on the information related to DRX, receive, from the UE, a Physical Random Access Channel, PRACH, preamble based on the paging message, transmit, to the UE, a random access response including Uplink, UL, grant based on the PRACH preamble, receive, from the UE, message 3 based on the UL grant, transmit, to the UE, a message for contention resolution based on the message 3, transmit, to the UE, a preconfigured uplink (UL) resource (PUR) configuration via RRC signalling; when the UE is in an idle mode, receive, from the UE, uplink data on the PUR; and transmit, to the UE, a feedback for the uplink data, wherein the feedback is configured to be transmitted on an NPDCCH after a specific time has passed from the PUR reception.

12 . The base station of claim 11 , wherein the specific time is a specific number of at least one subframe.

13 . The base station of claim 12 , wherein the specific number is four.

14 . The base station of claim 11 , wherein the processor is configured to:
monitor a feedback window on a search space for transmitting the feedback; and indicate, to the UE, stopping the monitoring based on whether or not DCI including the feedback is received on the feedback window.

15 . The base station of claim 11 , wherein the processor is configured to:
transmit, to the UE, a response on other second field excluding a first field required to indicate a PUR retransmission from a plurality of fields included in a UL grant.

16 . A user equipment (UE) receiving data from a base station in a narrowband (NB) wireless communication system, the UE comprising:
a radio frequency (RF) module configured to transmit and receive a radio signal; and a processor functionally connected to the RF module, wherein the processor is configured to: receive, from the base station, a paging message, transmit, to the base station, a Physical Random Access Channel, PRACH, preamble based on the paging message, receive, from the base station, a random access response including Uplink, UL, grant based on the PRACH preamble, transmit, to the base station, message 3 based on the UL grant, receive, from the base station, a message for contention resolution based on the message 3, receive, from the base station, a preconfigured uplink (UL) resource (PUR) configuration via RRC signalling; when the UE is in an idle mode, transmit, to the base station, uplink data on the PUR; and receive, from the base station, a feedback for the uplink data, wherein the feedback is configured to be received on an NPDCCH after a specific time has passed from the PUR transmission.

17 . The UE of claim 16 , wherein the specific time is a specific number of at least one subframe.

18 . The UE of claim 17 , wherein the specific number is four.

19 . The UE of claim 16 , wherein the processor is configured to:
monitor a feedback window on a search space for receiving the feedback; and stop the monitoring based on whether or not DCI including the feedback is received on the feedback window.

20 . The UE of claim 16 , wherein the processor is configured to:
receive, from the base station, a response on other second field excluding a first field required to indicate a PUR retransmission from a plurality of fields included in a UL grant.

Assignees

• Lg Electronics Inc

Inventors

• Shin Seokmin
• Park Changhwan
• Ahn Joonkul
• Hwang Seunggye

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/53

  based on regulatory allocation policies · CPC title

• H04W72/21 Primary

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L1/1822

  involving configuration of automatic repeat request [ARQ] with parallel processes · CPC title

• H04L27/2602

  Signal structure · CPC title