On two cross-layer assisted resource allocation schemes in multiuser multicarrier systems

Passas

2010 European Wireless Conference (EW)

2010

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In modern wireless communication systems, scheduling and resource allocation are two closely related tasks of the medium access control (MAC) and physical (PHY) layers respectively. In this paper, we present a separate yet interactive design of the two functional modules, where the scheduler prioritizes data packets from different service flows according to their traffic characteristics and feedback from the resource allocator, while the resource allocator performs quality of service (QoS) constrained transmit power minimization given lists of prioritized packets from the scheduler. The simulation results of applying the model to both cyclic prefix based OFDM (CP-OFDM) and the filter bank based multicarrier (FBMC) systems demonstrate the superior performance of the latter.

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Section: Resource Allocation Algorithmmentioning

confidence: 99%

Scheduling and resource allocation in OFDM and FBMC systems: An interactive approach and performance comparison

Passas

2010 European Wireless Conference (EW)

2010

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“…Otherwise we determine that (2) is infeasible. Regarding solving (3), two suboptimal algorithms are proposed in [10]. By suboptimally taking P min we tend to be pessimistic about the system performance, but avoid the complexity to find the optimal solution to (3).…”

Section: A Feasibility Exammentioning

confidence: 99%

“…Therefore, fixing subchannel assignment does not give us independent optimization problems for individual users. Here we adopt the heuristic method in [10], where for each user, all efficient MCS combinations are enumerated and compared with each other. Again we use the minimum η × ξ value on each subchannel as the comparison criteria.…”

Section: Determine the Bit-loading Matrix Bmentioning

confidence: 99%

“…The main contributions of this work are to investigate this trade-off thoroughly by using a cross-layer approach, as well as to mathematically formulate and solve the cross-layer assisted resource allocation problem in multicarrier systems based on it. We are motivated to study this problem through our previous works on energy and transmit power minimization algorithms [9] [10], which have been proposed based on ideas and methodologies from [3]- [5]. Some of these algorithms are adopted here to solve certain subproblems in the whole resource allocation procedure.…”

Section: Introductionmentioning

confidence: 99%

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On energy efficient cross-layer assisted resource allocation in multiuser multicarrier systems

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications

2009

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In this paper the quality of service (QoS) constrained radio resource allocation problem at the downlink of a multiuser multicarrier system is investigated. We demonstrate and analyze the trade-off between energy consumption and transmit power within a cross physical and link layer system model, which jointly considers power allocation, adaptive modulation and coding and ARQ/HARQ retransmission protocols. A novel transmit power constrained energy minimization problem is formulated based on the competing nature of the two resources. Due to the combinatorial property of the problem, a suboptimal heuristic resource allocation algorithm is proposed, the accuracy of which is compared with the dual optimal value obtained as a byproduct of the algorithm. Simulation results also provide performance comparisons on ARQ and HARQ protocols, and their different impacts on the choice of the optimal modes of operations.

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Optimal QoS-Constrained Resource Allocation in Downlink and Uplink Multicarrier Systems

2011 IEEE International Conference on Communications (ICC)

2011