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Automatic configuration of random access channel parameters in LTE systems

Title
Automatic configuration of random access channel parameters in LTE systems
Authors
Choi, SeunghyunLee, WonboKim, DongmyoungPark, Kyung-JoonChoi, SunghyunHan, Ki-Young
DGIST Authors
Park, Kyung-Joon
Issue Date
2011
Citation
2011 IFIP Wireless Days, WD 2011, 1(1)
Type
Conference
Article Type
Conference Paper
ISBN
9780000000000
ISSN
2156-9711
Abstract
In 3G long term evolution (LTE) systems, the random access channel (RACH) is used for initial access, resource request, and handover. Since the random access delay is determined by the arrival rate of the random access preambles and the number of RACH subframes, we should configure the number of RACH subframes given the arrival rate in order to guarantee the delay performance. In this work, by carefully taking account of a tradeoff between the number of RACH subframes and the random access delay, we present an optimization formulation that minimizes the number of RACH subframes for a given delay requirement. Furthermore, since the arrival rate of the random access preambles is time varying in reality, we further propose an estimation scheme for the arrival rate by reflecting the periodicity and the correlation between recent and future arrival rates. Our simulation results show that the proposed scheme for tuning the RACH subframes gives very promising network performance under time-varying environments. © 2011 IEEE.
URI
http://hdl.handle.net/20.500.11750/5545
DOI
10.1109/WD.2011.6098212
Publisher
Institute of Electrical and Electronics Engineers Inc.
Related Researcher
  • Author Park, Kyung Joon CSI(Cyber-Physical Systems Integration) Lab
  • Research Interests Design of Wireless Network for Cyber-Physical System; 무선 센서 네트워크; 강인 무선 네트워크
Files:
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Collection:
Information and Communication EngineeringCSI(Cyber-Physical Systems Integration) Lab2. Conference Papers


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