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Abstract

The LTE/LTE-Advanced testbed, developed by the Vodafone chair Mobile Communications Systems at the TU Dresden, is an experimental wireless testbed to study cognitive radio in cellular communication systems, specifically physical layer aspects of LTE OFDM (4G) and future candidate waveforms for 5G cellular systems. Typical scenarios for experiments are cognitive access of LTE and/or 5G in license-exempt spectrum bands (in particular in TV white space), cognitive access in LTE licensed band for machine-type communication (e.g. smart meters), and dynamic spectrum load balancing with cognitive access. The testbed is both, indoor and outdoor, and consists of up to two base stations and three user equipment devices. In the LTE-like cellular infrastructure relevant network parameters can be measured, such as bit error rates, outage events, throughput and latency. In order to carry out experiments, a user of the LTE/LTE advanced testbed can install own equipment either in the laboratory or in a bicycle rickshaw for outdoor use (230V power supply available). LTE network parameters are constantly monitored and recorded for benchmarking the impact of various cognitive radio schemes as secondary system on the primary LTE system.

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