Cross-layer analysis of the random access mechanism in Universal Terrestrial Radio Access
- Authors
- Yun, Ji-Hoon
- Issue Date
- Jan-2012
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Random access; Universal Terrestrial Radio Access; Cross layer
- Citation
- COMPUTER NETWORKS, v.56, no.1, pp 315 - 328
- Pages
- 14
- Journal Title
- COMPUTER NETWORKS
- Volume
- 56
- Number
- 1
- Start Page
- 315
- End Page
- 328
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/28154
- DOI
- 10.1016/j.comnet.2011.09.011
- ISSN
- 1389-1286
1872-7069
- Abstract
- In 3GPP Universal Terrestrial Radio Access, a user equipment uses the Random Access Channel (RACH) for uplink transmission if it does not have a pre-established dedicated channel. RACH is a contention-based transport channel in which access control and open-loop power control functionalities are provided under the interactions between Medium Access Control (MAC) and physical layers. This paper develops a Markov chain model to analyze complex cross-layer interactions in RACH procedures, which is crucial to understanding the RACH performance. Besides, the Markov chain accurately describes the time-synchronized RACH behavior in slot level. The presentation of this time-synchronized behavior is simplified by merging multiple sub-states, each of which corresponds to a slot delay, into a single state. Finally, the proposed model analytically evaluates the RACH performance in Rayleigh fading channels in terms of throughput and delay. (C) 2011 Elsevier B.V. All rights reserved.
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