Enhanced timing advance based random access procedure for NB-IoT systems

• Main Authors: Kai-Hsiang Hsu, 許凱翔
• Other Authors: Ray-Guang Cheng
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/58dg37

碩士 === 國立臺灣科技大學 === 電子工程系 === 106 === Narrowband Internet of Things (NB-IoT) is a new 3GPP standard aiming to support a massive number of device features long range, low complexity, low power, and low data rate. The 5th generation mobile communication (5G) massive machine type communication (mMTC) field will base on NB-IoT system. In this paper, we proposed an enhanced scheme target for solve the limitation of traditional timing advance based random access procedure (TARA), called enhanced TARA (eTARA) which is completely compatible with 3GPP standard’s random access procedures, we consider high delay spread effect between UE and eNB, proposed algorithm can automatically adjust to adapt different level of delay spread effect, eTARA also reduce the number of MSG3 transmission times in terms of reducing power consumption. Performance of eTARA procedure verified by computer simulation, comparison with TARA procedure and convention RA procedure.