Adaptive radio resource allocation for downlink OFDMA/SDMA systems with multimedia traffic

Tsai, Chun-Fan; Chang, Chung‐Ju; Ren, Fang-Ching; Yen, Chin-Ming

doi:10.1109/twc.2008.060994

Cited by 66 publications

(1 citation statement)

References 18 publications

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“…The orthogonal frequency division multiplexing (OFDM) combined with dynamic resource allocation technology can dynamically allocate the subcarriers to every user and allocate the transmit power on each subcarrier according to the channel state. Applying OFDM into the power line communication (PLC) system can effectively eliminate the multi-path, attenuation, time-varying and frequency selectivity of the power line channel, therefore, effectively improving the resource utilization, quality of service and data transmission rate [1][2][3][4][5]. Motivated by the above technique, OFDM-based PLC systems have become increasingly attractive.…”

Section: Introductionmentioning

confidence: 99%

Resource Allocation for Relay-Based OFDMA Power Line Communication System

Zhu

Chen

He³

2019

Electronics

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In this paper, we investigate the resource allocation for multi-user orthogonal frequency division multiple access (OFDMA) power line communication (PLC) systems, which satisfy both the total average transmit power constrained by PLC networks and the required interference limitations. First, we propose an optimal resource allocation scheme, with respect to joint consideration of the subcarrier and power constraint to maximize the throughput of the PLC system. Then, we divide the intractable problem into two individual subproblems to decrease the computational burden, which can avoid proceeding the mixed integer nonlinear programming (MINLP) problem. The proposed resource allocation scheme can ensure the optimality and efficiency of the system with rigorous proofs. The simulation results show that our proposed resource allocation scheme for the PLC system outperforms other algorithms, and is efficient with acceptable complexity.

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Section: Introductionmentioning

confidence: 99%

Resource Allocation for Relay-Based OFDMA Power Line Communication System

Zhu

Chen

He³

2019

Electronics

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Chunk‐based and fairness‐based resource allocation in multicast distributed MISO‐OFDMA systems

Papoutsis

Stamouli

2013

Int J Communication

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SUMMARYThe resource allocation problem for the downlink of orthogonal frequency‐division multiple access (OFDMA) wireless multicast systems is investigated. It is assumed that the base station consists of multiple antennas in a distributed antenna system (DAS), whereas each user is equipped with a single antenna. The multicasting technology is able to support several groups of users with flexible quality of service (QoS) requirements. The general mathematical formulation is provided, but achieving the optimal solution has a high computational cost. In our approach, the allocation unit is not the subcarrier, as in conventional OFDMA systems, but a set of contiguous subcarriers, which is called ‘chunk’. For practical implementation, a suboptimal but efficient algorithm is proposed in order to maximize the sum of the maximum attainable data rates of multicast groups of users, subject to total available power and proportional maximum attainable data rate constraints among multicast groups of users. Simulation and complexity analyses are provided to support the benefits of chunk‐based resource allocation to multicast OFDMA DASs, supporting that the proposed algorithm can be applied to latest‐generation wireless systems that provide QoS guarantees. Copyright © 2013 John Wiley & Sons, Ltd.

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Dynamic resource allocation in relay‐assisted OFDMA cellular system

2011

Trans. Emerg. Telecomms. Techs.

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This study investigates a relay-assisted orthogonal frequency division multiple access cellular system with joint consideration of direct and relaying paths. In this system, a novel implementation adopting full-duplex relaying is proposed for joint relay-destination selection, subcarrier and power allocation. This new implementation can be shown to significantly improve spectrum efficiency as compared with the conventional half-duplex relaying orthogonal frequency division multiple access. In addition, the proposed scheme enables flexible controllability on the tradeoff between system capacity and user fairness.

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Adaptive radio resource allocation for downlink OFDMA/SDMA systems with multimedia traffic

Cited by 66 publications

References 18 publications

Resource Allocation for Relay-Based OFDMA Power Line Communication System

Resource Allocation for Relay-Based OFDMA Power Line Communication System

Chunk‐based and fairness‐based resource allocation in multicast distributed MISO‐OFDMA systems

Dynamic resource allocation in relay‐assisted OFDMA cellular system

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