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Crowdsourcing-based network benchmarking is an emerging trend for the performance evaluation of mobile networks. This novel problem-solving method allows to collect the measurements from various mobile users in order to estimate overall network performance. In this measurement procedure the experiment is only defined via the used methodology to measure key performance indicator, e.g., the bandwidth...
WLAN technology defined by the IEEE 802.11 standard family delivers ever increasing raw data rates with each new standard. However, raw data rate does not reflect real-world performance for end users. This paper proposes an automated setup to conduct performance measurements for WLAN APs in consideration of network performance metrics. The main objective is to create a simple baseline for benchmarking...
The demand for fast, reliable and cost effective data transmission in home environments is ever increasing. Every new WLAN standard offers a higher data rate and better performance, at the cost of being more prone to interference. Interference mitigation techniques are not fully addressed in standard and leave room for improvement. Cross-technology interferers in ISM bands, such as microwave oven...
One of the most efficient methods to reduce the dropping and blocking probabilities of the secondary users (SUs) in cognitive radio networks is channel sub-banding strategy. This means that when all the channels are occupied by the primary and secondary users, then the SUs’ channels can be divided into two sub-bands, and two SUs can use a sub-band, simultaneously. In this paper, we propose an opportunistic...
Dynamic spectrum access techniques utilized in cognitive radio systems allow more efficient use of spectrum. In such systems, secondary users are supposed to operate in primary users' spectrum without interfering them. In this paper, we investigate an opportunistic spectrum sharing technique in cognitive radio networks for a special case in which, two secondary users are allowed to coexist in a channel...
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