On random access control for multipacket reception S-ALOHA in wireless cellular networks
department or school: Applied Science, Faculty of
department or school: Electrical and Computer Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Seo, Jun-Bae
issued: 2012-06-11T19:57:56Z
issued: 2012
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Studies on slotted ALOHA (S-ALOHA) systems have a long research history and been quite mature in the literature. However, this thesis revisits S-ALOHA systems by considering multipacket reception (MPR) channels, because previous studies are no longer applicable to MPR capable S-ALOHA systems due to the new random access channels (RACHs) of contemporary wireless cellular network standards. Particularly, it is dubious to apply the contention resolution algorithms (CRAs) developed so far for S-ALOHA systems to MPR S-ALOHA systems without any modification. Accordingly, this thesis proposes cross-layer CRAs and investigates the performance of some existing CRAs in MPR S-ALOHA systems in order to maximize the system throughput in tandem with stabilizing the system. Cross-layer CRAs proposed are based on estimating the system backlog information, which is obtained from multiple access interference (MAI) in the physical layer of Code Division Multiple Access (CDMA) MPR channel. Then, the proposed algorithms broadcast a retransmission probability in order to maximize the system throughput. The performance and the stability of the proposed algorithms are examined under various radio channel conditions. Compared to the proposed algorithms based on the system backlog information, the existing uniform backoff (UB) and exponential backoff (EB) algorithms are blind to such information. In order to understand the behaviour of these algorithms in MPR S-ALOHA, they are investigated with respect to various performance metrics and stability conditions. Additionally, the power ramping (PR) scheme is examined together with UB algorithm, in order to see whether it shows power capture effect in MPR S-ALOHA systems during a random access. Furthermore, the queueing performance of the MPR S-ALOHA system is investigated with an uplink traffic of the Markov Modulated Bernoulli Process (MMBP), when UB algorithm with retry limit is employed. It is also examined whether MPR S-ALOHA would be feasib…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/42473
note: On Random Access Control for Multipacket Reception S-ALOHA in Wireless Cellular Networks by Jun-Bae Seo B.Sc., Korea University, 2001 M.Sc., Korea University, 2003 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in The Faculty of Graduate Studies (Electrical and Computer Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) June 2012 c© Jun-Bae Seo, 2012 Abstract Studies on slotted ALOHA (S-ALOHA) systems have a long research history and been quite mature in the literature. However, this thesis revisits S-ALOHA systems by considering multipacket reception (MPR) channels, because previous studies are no longer applicable to MPR capable S-ALOHA systems due to the new random access channels (RACHs) of contemporary wireless cellular network standards. Particularly, it is dubious to apply the contention resolution algorithms (CRAs) developed so far for S-ALOHA systems to MPR S-ALOHA systems without any modification. Accordingly, this thesis proposes cross-layer CRAs and investigates the performance of some existing CRAs in MPR S-ALOHA systems in order to maximize the system throughput in tandem with stabilizing the system. Cross-layer CRAs proposed are based on estimating the system backlog information, which is obtained from multiple access interference (MAI) in the physical layer of Code Division Multiple Access (CDMA) MPR channel. Then, the proposed algorithms broadcast a retransmission probability in order to maximize the system throughput. The performance and the stability of the proposed algorithms are examined under various radio channel conditions. Compared to the proposed algorithms based on the system backlog information, the existing uniform backoff (UB) and exponential backoff (EB) algorithms are blind to such information. In order to understand the behaviour of these algorithms in MPR S-ALOHA, they are investigated with respect to various performance metrics and stability conditions. Additionally, th…
has type: Thesis/Dissertation
date issued: 2012-11
is shown at: 10.14288/1.0072824
language: eng
degree discipline: Electrical and Computer Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution 3.0 Unported
rights URI: http://creativecommons.org/licenses/by/3.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/42473