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Throughput Optimal Multi-user Scheduling via Hierarchical Modulation

Karaca, Mehmet LU and Ercetin, Ozgur (2012) In IEEE Wireless Communications Letters 1(3). p.245-248
Abstract
We investigate the network stability problem when two users are scheduled simultaneously. The key idea is to simultaneously transmit to more than one users experiencing different channel conditions by employing hierarchical modulation. For two-user scheduling problem, we develop a throughput-optimal algorithm which can stabilize the network whenever traffic load is stabilizable (i.e., it is within the achievable rate region.) In addition, we analytically prove that the proposed algorithm achieves larger achievable rate region compared to the conventional Max-Weight algorithm which employs uniform modulation and transmits to a single user. We demonstrate the efficacy of the algorithm on a realistic simulation environment using the... (More)
We investigate the network stability problem when two users are scheduled simultaneously. The key idea is to simultaneously transmit to more than one users experiencing different channel conditions by employing hierarchical modulation. For two-user scheduling problem, we develop a throughput-optimal algorithm which can stabilize the network whenever traffic load is stabilizable (i.e., it is within the achievable rate region.) In addition, we analytically prove that the proposed algorithm achieves larger achievable rate region compared to the conventional Max-Weight algorithm which employs uniform modulation and transmits to a single user. We demonstrate the efficacy of the algorithm on a realistic simulation environment using the parameters of High Data Rate protocol in a Code Division Multiple Access system. Simulation results show that with the proposed algorithm, the network can carry higher traffic load with lower delays. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Wireless Communications Letters
volume
1
issue
3
pages
245 - 248
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • Scopus:84862995357
ISSN
2162-2337
DOI
10.1109/WCL.2012.033012.120008
language
English
LU publication?
no
id
41058d9c-143c-4aa6-9a68-b7e7317b0619
date added to LUP
2016-05-12 12:34:30
date last changed
2016-10-13 05:08:32
@misc{41058d9c-143c-4aa6-9a68-b7e7317b0619,
  abstract     = {We investigate the network stability problem when two users are scheduled simultaneously. The key idea is to simultaneously transmit to more than one users experiencing different channel conditions by employing hierarchical modulation. For two-user scheduling problem, we develop a throughput-optimal algorithm which can stabilize the network whenever traffic load is stabilizable (i.e., it is within the achievable rate region.) In addition, we analytically prove that the proposed algorithm achieves larger achievable rate region compared to the conventional Max-Weight algorithm which employs uniform modulation and transmits to a single user. We demonstrate the efficacy of the algorithm on a realistic simulation environment using the parameters of High Data Rate protocol in a Code Division Multiple Access system. Simulation results show that with the proposed algorithm, the network can carry higher traffic load with lower delays.},
  author       = {Karaca, Mehmet and Ercetin, Ozgur},
  issn         = {2162-2337},
  language     = {eng},
  number       = {3},
  pages        = {245--248},
  publisher    = {ARRAY(0xb5797c0)},
  series       = {IEEE Wireless Communications Letters},
  title        = {Throughput Optimal Multi-user Scheduling via Hierarchical Modulation},
  url          = {http://dx.doi.org/10.1109/WCL.2012.033012.120008 },
  volume       = {1},
  year         = {2012},
}