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While 3GPP has been developing NB-IoT, the market of Low Power Wide Area Networks has been mastered by cheap and simple Sigfox and LoRa/LoRaWAN technologies. Being positioned as having an open standard, LoRaWAN has attracted also much interest from the research community. Specifically, many papers address the efficiency of its PHY layer. However MAC is still underinvestigated. Existing studies of...
In early 2016 Wi-Fi Alliance announced a new technology — Wi-Fi HaLow — which aims to master the raising Internet of Things market with its tremendous number of devices. This technology brings revolutionary changes to Wi-Fi, improving transmission reliability and power efficiency in scenarios with thousands of sensor stations being connected to a single access point. However neither novel channel...
The rising tide of the Internet of Things has brought to the surface numerous low-power, long-range and low-bitrate wireless network technologies. One of them, LoRaWAN, is being intensely popularized as a solution for sensor networks, however, its potential and limitations are unclear, because there is still neither accurate study nor massive LoRaWAN deployment. This paper surveys and analyzes LoRaWAN...
Following the interest of the global research and industrial community in the concept of Internet of Things, IEEE 802 LAN/MAN standard committee is developing the IEEE 802.11ah amendment that will shift the Wi-Fi technology to the area of Machine-to-Machine communications. One of the most important problems considered by the new amendment is the energy-efficient communication of wireless stations,...
To address 5G challenges, IEEE 802.11 is currently developing new amendments to the Wi-Fi standard, the most promising of which is 802.11ax. A key scenario considered by the developers of this amendment is dense and overlapped networks typically present in residential buildings, offices, airports, stadiums, and other places of a modern city. Being crucial for Wi-Fi hotspots, the hidden station problem...
No. In the paper, we consider compressed video streaming over the wireless channel. From time to time, dynamically changing channel characteristics cause queue overflows, packet drops and, finally, video quality degradation. To eliminate it, the well known I-Frame delay algorithm drops the least important packets when the queue overflows. However, this algorithm starts working only when the queue...
Analysing the ability of networking protocols to stream real-time video data over lossy networks, many researchers are faced to the problem of video quality estimation, for which the MSE and PSNR metrics are widely used. However, many existing tools used to calculate these metrics do not take into account frame losses inevitable with video streaming over wireless networks. Other tools do account for...
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