Invention Grant
- Patent Title: Random access method considering a coverage level, subcarrier spacing configuration and/or multi-tone configuration in internet of things environment
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Application No.: US16591704Application Date: 2019-10-03
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Publication No.: US11064495B2Publication Date: 2021-07-13
- Inventor: Tae-Jin Lee , Yunmin Kim
- Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
- Applicant Address: KR Suwon-si
- Assignee: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
- Current Assignee: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
- Current Assignee Address: KR Suwon-si
- Agency: NSIP Law
- Priority: KR10-2016-0011893 20160129,KR10-2016-0025783 20160303,KR10-2016-0043317 20160408,KR10-2016-0058374 20160512,KR10-2016-0154109 20161118
- Main IPC: H04W72/04
- IPC: H04W72/04 ; H04W74/08 ; H04W72/02 ; H04L1/18 ; H04W4/70

Abstract:
Provided is random access method, performed by terminal for uplink data transmission during random access process between cellular based machine communication terminal and base station. The method includes performing random access process between cellular based machine communication terminal and base station, and the random access process includes selecting random access resource by considering coverage level and whether to support multi-tone transmission or not. Terminal can perform efficient random access process in response to coverage level, subcarrier spacing configuration, multi-tone configuration when machine communication terminal or machine communication device which operates in cellular based IoT system perform random access, number of repetition may be increased, when coverage level is changed, by minimizing the change in coverage level, and operation time of the terminal, due to standing by up to PRACH resource corresponding to the coverage level, may be reduced to reduce energy consumption and to enhance delay time performance.
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