Cross-layer resource allocation over wireless relay networks for quality of service provisioning

The authors propose a physical-datalink cross-layer resource allocation scheme over wireless relay networks for quality-of-service (QoS) guarantees. By integrating information theory with the concept of effective capacity, the proposed scheme aims at maximizing the relay network throughput subject t...

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Bibliographic Details
Published in:IEEE journal on selected areas in communications 2007-05, Vol.25 (4), p.645-656
Main Authors: Jia Tang, Jia Tang, Xi Zhang, Xi Zhang
Format: Article
Language:English
Subjects:
Allocations
Constraint theory
Cross layer design
Decoding
Delay
Delay effects
Dynamics
Exchanging
Information theory
Multimedia
Physical layer
Provisioning
Quality of service
Relay networks
Relays
Resource allocation
Resource management
Studies
Throughput
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Summary:The authors propose a physical-datalink cross-layer resource allocation scheme over wireless relay networks for quality-of-service (QoS) guarantees. By integrating information theory with the concept of effective capacity, the proposed scheme aims at maximizing the relay network throughput subject to a given delay QoS constraint. This delay constraint is characterized by the so-called QoS exponent thetas, which is the only requested information exchanged between the physical layer and the datalink layer in our cross-layer design based scheme. Over both amplify-and-forwards (AF) and decode-and-forward (DF) relay networks; the authors develop the associated dynamic resource allocation algorithms for wireless multimedia communications. Over DF relay network, the authors also study a fixed power allocation scheme to provide QoS guarantees. The simulations and numerical results verify that our proposed cross-layer resource allocation can efficiently support diverse QoS requirements over wireless relay networks. Both AF and DF relays show significant superiorities over direct transmissions when the delay QoS constraints are stringent. On the other hand, the results demonstrate the importance of deploying the dynamic resource allocation for stringent delay QoS guarantees.
ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2007.070502