Abstract
We provide the solution for optimizing the power and resource allocation over block-fading relay-assisted broadcast channels in order to maximize the long term average achievable rates region of the users. The problem formulation assumes regenerative (repetition coding) decode-and-forward (DF) relaying strategy, long-term average total transmitted power constraint, orthogonal multiplexing of the users messages within the channel blocks, possibility to use a direct transmission (DT) mode from the base station to the user terminal directly or a relaying (DF) transmission mode, and partial channel state information. We show that our optimization problem can be transformed into an equivalent "no-relaying" broadcast channel optimization problem with each actual user substituted by two virtual users having different channel qualities and multiplexing weights. The proposed power and resource allocation strategies are expressed in closed-form that can be applied practically in centralized relay-assisted wireless networks. Furthermore, we show by numerical examples that our scheme enlarges the achievable rates region significantly.
| Original language | English |
|---|---|
| Article number | 5751189 |
| Pages (from-to) | 1904-1913 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Wireless Communications |
| Volume | 10 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jan 2011 |
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Keywords
- long-term-evolution (LTE)
- multiuser diversity
- relaying
- resource allocation
- Wireless networks
ASJC Scopus subject areas
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Joint power and resource allocation for block-fading relay-assisted broadcast channels. / Shaqfeh, Mohammad; Alnuweiri, Hussein.
In: IEEE Transactions on Wireless Communications, Vol. 10, No. 6, 5751189, 01.01.2011, p. 1904-1913.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Joint power and resource allocation for block-fading relay-assisted broadcast channels
AU - Shaqfeh, Mohammad
AU - Alnuweiri, Hussein
PY - 2011/1/1
Y1 - 2011/1/1
N2 - We provide the solution for optimizing the power and resource allocation over block-fading relay-assisted broadcast channels in order to maximize the long term average achievable rates region of the users. The problem formulation assumes regenerative (repetition coding) decode-and-forward (DF) relaying strategy, long-term average total transmitted power constraint, orthogonal multiplexing of the users messages within the channel blocks, possibility to use a direct transmission (DT) mode from the base station to the user terminal directly or a relaying (DF) transmission mode, and partial channel state information. We show that our optimization problem can be transformed into an equivalent "no-relaying" broadcast channel optimization problem with each actual user substituted by two virtual users having different channel qualities and multiplexing weights. The proposed power and resource allocation strategies are expressed in closed-form that can be applied practically in centralized relay-assisted wireless networks. Furthermore, we show by numerical examples that our scheme enlarges the achievable rates region significantly.
AB - We provide the solution for optimizing the power and resource allocation over block-fading relay-assisted broadcast channels in order to maximize the long term average achievable rates region of the users. The problem formulation assumes regenerative (repetition coding) decode-and-forward (DF) relaying strategy, long-term average total transmitted power constraint, orthogonal multiplexing of the users messages within the channel blocks, possibility to use a direct transmission (DT) mode from the base station to the user terminal directly or a relaying (DF) transmission mode, and partial channel state information. We show that our optimization problem can be transformed into an equivalent "no-relaying" broadcast channel optimization problem with each actual user substituted by two virtual users having different channel qualities and multiplexing weights. The proposed power and resource allocation strategies are expressed in closed-form that can be applied practically in centralized relay-assisted wireless networks. Furthermore, we show by numerical examples that our scheme enlarges the achievable rates region significantly.
KW - long-term-evolution (LTE)
KW - multiuser diversity
KW - relaying
KW - resource allocation
KW - Wireless networks
UR - http://www.scopus.com/inward/record.url?scp=85027921365&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85027921365&partnerID=8YFLogxK
U2 - 10.1109/TWC.2011.040411.101240
DO - 10.1109/TWC.2011.040411.101240
M3 - Article
AN - SCOPUS:85027921365
VL - 10
SP - 1904
EP - 1913
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
SN - 1536-1276
IS - 6
M1 - 5751189
ER -