US 11,109,410 B2 · Method and device for performing LBT process on multiple carriers in wireless access system supporting unlicensed band

Abstract

The present invention relates to a wireless access system supporting an unlicensed band. According to this disclosure, a method by which a terminal performs LBT in a wireless access system supporting an unlicensed band and multiple carriers can comprise the steps of: receiving, from a base station, each of uplink grants for scheduling uplink channels on two or more component carriers (CCs); randomly selecting a first CC on which a first LBT is to be performed from among the two or more CCs; performing the first LBT on the selected first CC: and performing a second LBT on the remaining CCs among the two or more CCs, wherein the first LBT can be a random back-off-based LBT for performing a random back-off by a random back-off counter value, and the second LBT can be a channel sensing-based LBT for sensing a channel during a predetermined time interval before uplink transmission.

Claims16

Dependent claims

A user equipment (UE) for performing an uplink channel access procedure (CAP) in a wireless access system, the UE comprising:

a receiver functionally coupled to a processor;
and
the processor configured to:
receive, from a base station, a downlink control information (DCI) for scheduling uplink channels on a set of carriers;
randomly select a first carrier for a first uplink AP from among the set of carriers,
perform the first uplink CAP on the selected first carrier, and
perform a second uplink CAP on each remaining carrier of the set of carriers,
wherein the DCI comprises information indicating the first uplink CAP for the set of carriers, and
wherein the uplink channels on the set of carriers are scheduled to transmit simultaneously in a time resource.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/598,547Filed 10 Oct 2019 · continuation

Priority

17 Sep 2015

Published

US 2020/0045739 A16 Feb 2020

Granted

31 Aug 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04W 74/0808
Non-scheduled access, e.g. ALOHA: using carrier sensing, e.g. carrier sense multiple access [CSMA]
H04L 5/001
The frequencies being orthogonal, e.g. OFDM or DMT: the frequencies being arranged in component carriers
H04W 16/14
Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures: spectrum sharing…
H04W 72/1268
Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows: of uplink data flows

Family

Application62/220,231Us provisional application · filed 17 Sep 2015

Application62/370,248Us provisional application · filed 3 Aug 2016

PCT/KR2016/010036Parent of this continuation · filed 7 Sep 2016

US 2020/0045739 A1Pre-grant publication · published 6 Feb 2020

Application15/758,306Parent of this continuation

US 10,492,222 B2Parent of this continuation

US 2018/0255578 A1Published application

US 11,109,410 B2This patent

From the US filing history. Foreign family members aren’t listed.

Method and device for performing LBT process on multiple carriers in wireless access system supporting unlicensed band

Life of this patent

Method and device for performing LBT process on multiple carriers in wireless access system supporting unlicensed band

Life of this patent

Abstract

Claims16