Preamble Allocation for LTE Networks Supporting RACH-based Small Data Transmissions

• Main Authors: Yu-Yi Chu, 朱祐毅
• Other Authors: Ray-Guang Cheng
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/93149399912991549993

碩士 === 國立臺灣科技大學 === 電子工程系 === 103 === Random access channel (RACH)-based small data transmission is one of the solutions proposed by 3GPP for the machine devices to transmit small packets without the establishment of a signalling connection with the core network. . The performance of the RACH-based small data transmission is highly dependent on the preamble allocation of the RACH. In this paper, we consider a cellular network which adopts RACH-based small data transmission to support multiple access-class machine devices. The preambles of the RACH is dedicatedly assigned to each access-class or partially shared by all access-classes. We present an analytical model to estimate the access success probability and the mean access delay of the devices for each access-class and identify the best preamble allocation method according to the given offered loads and traffic patterns.