On optimal relay selection and subcarrier assignment in OFDMA relay networks with QoS guarantees | IEEE Conference Publication | IEEE Xplore

On optimal relay selection and subcarrier assignment in OFDMA relay networks with QoS guarantees


Abstract:

This paper investigates QoS-aware relay selection and subcarrier assignment in cooperative OFDMA networks. In contrast to some existing works, which solve the sum-rate ma...Show More

Abstract:

This paper investigates QoS-aware relay selection and subcarrier assignment in cooperative OFDMA networks. In contrast to some existing works, which solve the sum-rate maximization problem directly, we first simplify it by exploiting the structure of the optimal solution, then we solve the simplified problem. To characterize the optimal network sum-rate performance, we solve the simplified problem optimally by the branch-and-cut method. In addition to the sum-rate maximization problem, we demonstrate that its two variants can also be similarly simplified and then be solved optimally by the branch-and-cut method. The optimal method serving as the benchmark is particularly suitable for moderate scale problems. Simulations show that the branch-and-cut method can locate the optimal solution effectively, which may in turn provide some insights into the performance of the heuristic method.
Date of Conference: 10-14 June 2014
Date Added to IEEE Xplore: 28 August 2014
Electronic ISBN:978-1-4799-2003-7

ISSN Information:

Conference Location: Sydney, NSW, Australia

References

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