Hybrid radio resource allocation and interference coordination for type 1a‐relayed long term evolution uplink

Ahmed, Irfan; Mohamed, Amr

doi:10.1049/iet-com.2014.0028

Cited by 2 publications

(2 citation statements)

References 29 publications

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\begin{matrix} R_{l, m, k}^{(n, s)} (t) = \{\begin{array}{l} \frac{1}{2} \min ({}, \underset{2}{\log} ((), 1 + \frac{{falsefalse}_{γ}^{l, m, 0}}{normalΓ}), \underset{2}{\log} ((), 1 + \frac{{falsefalse}_{γ}^{l, m, k}}{normalΓ})), & k, m \neq 0 \\ \underset{2}{\log} ((), 1 + \frac{γ_{l, 0, k}^{(n, s)}}{normalΓ}), & k \neq 0 \end{array} \end{matrix}

where Γ is the SNR gap between Shannon capacity and the performance obtained by the employed modulation and coding scheme in practical wireless channel. For M‐ary quadrature amplitude modulation (M‐QAM) and target bit error rate of P e , Γ=−(2/3) l n (5 P e ) . In the first expression, 1/2 is used to compensate the two time‐slot transmission in access link.…”

Section: Problem Formulationmentioning

confidence: 99%

“…where is the SNR gap between Shannon capacity and the performance obtained by the employed modulation and coding scheme in practical wireless channel. For M-ary quadrature amplitude modulation (M-QAM) and target bit error rate of Pe, D .2=3/ln.5Pe/ [21]. In the first expression, 1/2 is used to compensate the two time-slot transmission in access link.…”

Section: Problem Formulationmentioning

confidence: 99%

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3‐D quasi proportional fairness scheduling in relay‐assisted multicell LTE‐A downlink

Ahmed

2016

Trans. Emerging Tel. Tech.

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This paper presents a three‐dimensional (3‐D: space‐time‐frequency) quasi proportional fairness (QPF)‐based radio resource allocation and interference coordination scheme in multicell long‐term evolution‐advanced downlink. We formulate the resource allocation and interference coordination problem as a QPF‐based utility maximisation problem, wherein, QPF reduces the complexity compared with the conventional proportional fairness. Interference has been minimised through time, frequency and space domain resource allocation. The proposed 3‐D scheme utilises two time slots for intercell interference management, spatial position‐based frequency resource allocation for intracell interference mitigation, and frequency domain orthogonality across user equipment (UE) and relays for inter‐UE and UE‐relays interference management. It has been shown that the relaxed non‐convex primal problem and the dual problem have zero duality gap under the time‐sharing and tolerable interference constraints. The relaxed optimal problem has been solved through the Lagrange dual method. Simulation results show the efficacy of the proposed 3‐D scheme compared with the recently presented three slots time domain interference coordination with round robin and proportional fairness time domain interference coordination schemes. It has been observed that the proposed heuristic 3D with equal power scheme exhibits same performance as the heuristic 3D with water‐filling power allocation and retains the desired optimal level for more than 60% of the average users' throughput. Copyright © 2016 John Wiley & Sons, Ltd.

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