Statistical delay QoS driven resource allocation and performance analysis for wireless communication networks

Yu, Wenjuan and Ni, Qiang and Musavian, Leila (2018) Statistical delay QoS driven resource allocation and performance analysis for wireless communication networks. PhD thesis, Lancaster University.

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Delay quality-of-service (QoS) guarantees play a critical role in enabling delay-sensitive wireless applications. By applying the theory of effective capacity (EC), the maximum arrival rate with a guaranteed delay-outage probability constraint, is analyzed and investigated in terms of delayconstrained resource allocation and link-layer throughput analysis. Firstly, a joint optimization problem of link-layer energy efficiency (EE) and EC in a single-user single-carrier communication system, is proposed and investigated, under a delay violation probability requirement and an average transmit power constraint. Formulated as a normalized multiobjective optimization problem (MOP), the problem is transformed into a weighted single-objective optimization problem (SOP), and then solved. The proposed optimal power value is proved to be sufficient for the Pareto optimal set of the original EE-EC MOP. Secondly, a total EC maximization problem subject to the individual linklayer EE requirement as well as the per-user average transmit power limit, in a multi-user multi-carrier orthogonal frequency-division multiple access (OFDMA) system, is proposed and analyzed. Formulated as a combinatorial integer programming problem, the problem is decoupled into a frequency provisioning problem and an independent per-user multi-carrier EE-EC tradeoff problem. A low-complexity heuristic algorithm is proposed to obtain the subcarrier assignment solution coupled with a per-user optimal power allocation strategy, across frequency and time domains. Finally, the achievable link-layer rate under the per-user delay QoS requirements is studied for a downlink M-user non-orthogonal multiple access (NOMA) network. The impact of the transmit signal-to-noise ratio (SNR) and the delay QoS requirement on the per-user achievable EC and the total link-layer rate is investigated and compared between NOMA and orthogonal multiple access (OMA) networks. All theoretical conclusions and closed-form expressions are confirmed with Monte Carlo results.

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Thesis (PhD)
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This PhD thesis needs to be embargoed for one year, because some part of it is submitted to Journals or waiting to get submitted to Journals. These Journals require that the submitted manuscripts are not already published elsewhere. Online availability is considered as the thesis being already published.
?? delay qos constraint energy efficiency (ee)effective capacity (ec)non-orthogonal multiple access (noma)orthogonal frequency-division multiple access (ofdma)optimization ??
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02 Feb 2018 09:58
Last Modified:
27 Apr 2024 00:03