Experimental Validation of a Distributed Algorithm for Dynamic Spectrum Access in Local Area Networks

Tonelli, Oscar; Berardinelli, Gilberto; Tavares, Fernando M. L.; Cattoni, Andréa; Kovács, István Z.; Sørensen, Troels B.; Popovski, Petar; Mogensen, Preben

doi:10.1109/vtcspring.2013.6692557

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Software defined radio (SDR) testbeds represent a flexible and cost-effective paradigm for an agile experimentation of wireless research concepts. In that respect, our previous experimental work has been mainly focused on the validation of a known spectrum sharing algorithm [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of interference rejection combining for 5G small cells

Assefa¹,

Berardinelli²,

Tavares³

et al. 2015

2015 IEEE Wireless Communications and Networking Conference (WCNC)

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The Interference Rejection Combining (IRC) receiver can significantly boost the network throughput in scenarios characterized by dense uncoordinated deployment of small cells, as targeted by future 5th generation (5G) radio access technology. This paper presents an experimental study on the potential benefit of IRC receiver in real deployment scenarios. The study is carried out using a software defined radio (SDR) testbed network with four cells, each featuring one Access Point (AP) and one User Equipment (UE) with two antennas. The testbed network was placed in an indoor office and open hall scenarios, respectively. In each scenario, the cells were arranged to characterize the propagation in different spatial configurations. Using the obtained propagation data, we analysed the cases of closed and open subscriber group for the respective scenarios, to compare the achievable throughput with IRC and Maximum Ratio Combining (MRC) receivers. Different frequency reuse schemes were also considered. The throughput results confirm the effectiveness of the IRC receiver in improving the network throughput with respect to the MRC receiver, under the assumption of single stream (rank 1) transmission. Results show average gains up to around 40% and outage gains up to 70% over the MRC receiver. The combination of the IRC receiver and frequency reuse achieves a favourable trade-off between the network throughput and fairness. Overall, due to the direct propagation, the open hall open subscriber group scenario is benefiting the most from the ability of the IRC receiver to cancel a strong dominant interferer.

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Section: Introductionmentioning

confidence: 99%

Experimental evaluation of interference rejection combining for 5G small cells

Assefa¹,

Berardinelli²,

Tavares³

et al. 2015

2015 IEEE Wireless Communications and Networking Conference (WCNC)

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“…Our previous experimental work has been focused on the verification of dynamic spectrum sharing algorithms in an indoor office scenario of multiple cells [5].…”

Section: Introductionmentioning

confidence: 99%

Distributed Synchronization of a testbed network with USRP N200 radio boards

Berardinelli

Buthler

Tavares

et al. 2014

2014 48th Asilomar Conference on Signals, Systems and Computers

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Network synchronization is a fundamental enabler of interference mitigation techniques that are required in ultradense deployment of small cells as targeted by upcoming 5th Generation (5G) wireless system. In this paper, we experimentally evaluate the possibility of acheiving in a distributed manner (i.e. without any external high precision reference clocks) a tight time alignment in a network of small cells. We are considering a software defined radio (SDR) network of 8 nodes, where each node adopts the Universal Software Radio Peripheral N200 (USRP N200) radio boards by Ettus Research, and the ASGARD software platform. Experimental results demonstrate the possibility of synchronizing the timing of the multiple nodes with a few μs precision, despite of the occurrencies of beacon losses.

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