US Patent No. 10,219,303

NARROWBAND INTERNET OF THINGS SYSTEM AND PREAMBLE TRANSMISSION METHOD THEREOF


Patent No. 10,219,303
Issue Date February 26, 2019
Title Narrowband Internet Of Things System And Preamble Transmission Method Thereof
Inventorship Chia-Hung Wei, Taipei (TW)
Hai-Han Wang, Taipei (TW)
Assignee Institute For Information Industry, Taipei (TW)

Claim of US Patent No. 10,219,303

1. A preamble transmission method for a Narrowband Internet of Things (NB-IoT) system, the NB-IoT system comprising a base station and a user equipment, the preamble transmission method comprising:(a) the base station broadcasting a random access resource configuration, wherein the random access resource configuration comprises a Narrowband Physical Random Access Channel (NPRACH) transmission period and an NPRACH access intermitting setting, the NPRACH access intermitting setting allocates an NPRACH pause period and a Narrowband Physical Downlink Control Channel (NPDCCH);
(b) the user equipment receiving the random access resource configuration;
(c) the user equipment transmitting a preamble repeatedly in an NPRACH during the NPRACH transmission period according to the random access resource configuration;
(d) the base station detecting the preamble in the NPRACH during the NPRACH transmission period;
(e) the base station transmitting a random access feedback message in the NPDCCH during the NPRACH pause period according to the preamble;
(f) the user equipment receiving the random access feedback message in the NPDCCH during the NPRACH pause period; and
(g) the user equipment adjusting transmission behavior of transmitting the preamble during the NPRACH transmission period according to the random access feedback message.