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Patent Searching and Data


Title:
METHOD, APPARATUS, AND SYSTEM FOR ACCESSING CHANNEL IN UNLICENSED BAND
Document Type and Number:
WIPO Patent Application WO/2017/047883
Kind Code:
A1
Abstract:
The present invention relates to a method, an apparatus, and a system for adjusting a competitive window size for performing channel access. Particularly, the present invention comprises the steps of: receiving a plurality of HARQ-ACK responses for a downlink channel (downlink channels) of a particular cell; generating a random number N (N≥0) within the competitive window size; and implementing the downlink transmission in the particular cell after the particular cell has been in standby for N slots in an idle state, wherein the competitive window size is greater than a reference value when a NACK rate of the plurality of HARQ-ACK responses is greater than or equal to a reference value, and the competitive window size is reset as a minimum value when the NACK rate of the plurality of HARQ-ACK responses is less than the reference value.

Inventors:
NOH MINSEOK (KR)
KWAK JINSAM (KR)
SON JUHYUNG (KR)
Application Number:
PCT/KR2016/001843
Publication Date:
March 23, 2017
Filing Date:
February 25, 2016
Export Citation:
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Assignee:
WILUS INST STANDARDS & TECHNOLOGY INC (KR)
International Classes:
H04W74/08; H04L1/18; H04L47/27
Domestic Patent References:
WO2013157787A12013-10-24
Foreign References:
US20150055589A12015-02-26
US20140112289A12014-04-24
Other References:
ERICSSON ET AL.: "WF on CW Adjustment Based on HARQ-ACK Feedback", R1-154959, 3GPP TSG RAN WG1 MEETING #82, 30 August 2015 (2015-08-30), Beijing, China, XP051044610
SHARP: "Contention Window Size Adjustment for LAA", R1-154064, 3GPP TSG RAN WG1 MEETING #82, 15 August 2015 (2015-08-15), Beijing. China, XP050991276
See also references of EP 3361811A4
Attorney, Agent or Firm:
LIM, Kukil (KR)
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