Symbol-level network coding for wireless mesh networks
Proceedings of the ACM SIGCOMM 2008 conference on Data communication
Demonstration of highly programmable downlink OFDMA (WiMax) transceivers for SDR systems
Proceedings of the tenth ACM international symposium on Mobile ad hoc networking and computing
OFDMA based multiparty medium access control in wireless ad hoc networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
A case for adaptive sub-carrier level power allocation in OFDMA networks
Proceedings of the thirteenth ACM international symposium on Mobile Ad Hoc Networking and Computing
Fair Allocation of Subcarrier and Power in an OFDMA Wireless Mesh Network
IEEE Journal on Selected Areas in Communications
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Orthogonal Frequency-Division Multiple Access (OFDMA) has emerged as an advanced technique to enhance resource utilization and efficiency in infrastructure-based networks. However, its performance in wireless mesh networks is mostly unexplored. In this paper, we practically study the benefits of OFDMA in a scenario with multiple co-located transmitters and receivers without centralized controller by means of the software-defined radio platform WARP. We propose five different dynamic subchannel allocation strategies and compare their performance to that of OFDM as a baseline. Four of these strategies are constrained to be fair with respect to the number of subchannels allocated per communication link, while the fifth always allocates a subchannel to its best possible communication link. By means of testbed experiments with software-defined radios, we show that the overall bit error rate can be reduced by a factor of ten, while the overall channel capacity can locally be enhanced by 10% to 30%. Further, we use the Subchannel Avoidance Gain as a metric to quantify the ability of a dynamic subchannel allocation strategy to avoid subchannel allocations resulting in poor channel conditions.