Power Allocation Framework for OFDMA-based Decode-and-Forward Cellular Relay Networks Power Allocation Framework for OFDMA-based Decode-and-Forward Cellular Relay Networks
Journal of Communications and Networks
v.16
no.5
2014년, pp.559 - 567
Yalda Farazmand
(University of Manitoba)
,
Attahiru S. Alfa
(University of Manitoba)
In this paper, a framework for power allocation ofdownlink transmissions in orthogonal frequency division multipleaccess-based decode-and-forward cellular relay networks is investigated.We consider a system with a single base station communicatingwith multiple users assisted by multiple relays. The relayshave limited power which must be divided among the usersthey support in order to maximize the data rate of the whole network.Advanced power allocation schemes are crucial for such networks.The optimal relay power allocation which maximizes thedata rate is proposed as an upper bound, by finding the optimalpower requirement for each user based on knapsack problem formulation.Then by considering the fairness, a new relay power allocationscheme, called weighted-based scheme, is proposed. Finally,an efficient power reallocation scheme is proposed to efficiently utilizethe power and improve the data rate of the network. Simulationresults demonstrate that the proposed power allocation schemescan significantly improve the data rate of the network comparedto the traditional scheme.
In this paper, a framework for power allocation ofdownlink transmissions in orthogonal frequency division multipleaccess-based decode-and-forward cellular relay networks is investigated.We consider a system with a single base station communicatingwith multiple users assisted by multiple relays. The relayshave limited power which must be divided among the usersthey support in order to maximize the data rate of the whole network.Advanced power allocation schemes are crucial for such networks.The optimal relay power allocation which maximizes thedata rate is proposed as an upper bound, by finding the optimalpower requirement for each user based on knapsack problem formulation.Then by considering the fairness, a new relay power allocationscheme, called weighted-based scheme, is proposed. Finally,an efficient power reallocation scheme is proposed to efficiently utilizethe power and improve the data rate of the network. Simulationresults demonstrate that the proposed power allocation schemescan significantly improve the data rate of the network comparedto the traditional scheme.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.