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

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Cross-layer resource allocation over wireless relay networks for quality of service provisioning (2007)

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by Jia Tang , Xi Zhang

Venue:	IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
Citations:	40 - 3 self

BibTeX

@ARTICLE{Tang07cross-layerresource,
    author = {Jia Tang and Xi Zhang},
    title = {Cross-layer resource allocation over wireless relay networks for quality of service provisioning},
    journal = {IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS},
    year = {2007},
    volume = {25},
    number = {4},
    pages = {645--656}
}

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Abstract

We propose a physical-datalink cross-layer resource allocation scheme over wireless relay networks for quality-ofservice (QoS) guarantees. By integrating information theory with the concept of effective capacity, our proposed scheme aims at maximizing the relay network throughput subject to a given delay QoS constraint. This delay constraint is characterized by the socalled QoS exponent θ, 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-forward (AF) and decode-and-forward (DF) relay networks, we develop the associated dynamic resource allocation algorithms for wireless multimedia communications. Over DF relay network, we 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, our results demonstrate the importance of deploying the dynamic resource allocation for stringent delay QoS guarantees.

Keyphrases

wireless relay network cross-layer resource allocation service provisioning effective capacity wireless multimedia communication delay qos constraint information theory numerical result qos guarantee cross-layer design fixed power allocation scheme associated dynamic resource allocation algorithm socalled qos exponent datalink layer direct transmission df relay network resource allocation delay constraint physical layer diverse qos requirement show significant superiority physical-datalink cross-layer resource allocation scheme relay network throughput subject stringent delay qos guarantee convex optimization index term cross-layer design relay network dynamic resource allocation

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