{"id":285,"date":"2020-10-26T10:12:48","date_gmt":"2020-10-26T10:12:48","guid":{"rendered":"http:\/\/wine.rdi.uoc.edu\/?page_id=285"},"modified":"2020-10-28T07:49:24","modified_gmt":"2020-10-28T07:49:24","slug":"consulting","status":"publish","type":"page","link":"http:\/\/wine.rdi.uoc.edu\/index.php\/consulting\/","title":{"rendered":"Research Challenges"},"content":{"rendered":"\n

IETF 6TiSCH<\/h2>\n\n\n\n
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We have been involved in the development of the IEEE802.15.4 Time Slotted Channel Hopping MAC layer and the further development of the IETF 6TiSCH stack. We are authors of some of the RFCs for this standard protocol stack targeting industrial and building automation. We are also co-authors and maintainers of the OpenWSN protocol stack, providing an open source implementation of the 6TiSCH ecosystem. We collaborate with numerous companies in the area to advise and support their implementation of the different RFCs.<\/p>\n\n\n\n

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RFC8180<\/a><\/div>\n\n\n\n
RFC8480<\/a><\/div>\n\n\n\n
IEEE Tutorial<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n
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LoRaWAN<\/h2>\n\n\n\n
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LoRaWAN is a widely adopted protocol stack for large scale long range IoT applications. LoRaWAN relies on a patented modulation commercialized by Semtech and referred to as LoRa. It exploits chirp spread spectrum techniques combined with convolutional codes for robustness. Lately Semtech announced a new physical layer that targets larger scale applications, enabling satellite-located gateways. This technology is referred to as LoRa-E. In the last years we have been deeply involved in the evaluation of this technological ecosystem and produced numerous studies regarding its performance.<\/p>\n\n\n\n

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IEEE LORA Limits<\/a><\/div>\n\n\n\n
arxiv lora-e<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
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NB-IoT Characterization<\/h2>\n\n\n\n
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We have evaluated NB-IoT from an end user perspective. We wanted to understand the delay, energy consumption and capacity of the network using commercially available devices. We have observed that the connection cost is high in terms of energy and discussed its performance compared to other LPWAN technologies. We have all the tools to perform further evaluations of the technology and have assessed different companies in the use of the technology<\/p>\n\n\n\n

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IEEE NB-IoT<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n
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Sustainable Edge Computing<\/h2>\n\n\n\n
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We are interested in the reuse of excess energy from local, small scale renewable energy sources. Battery storage or injecting the excess energy to the grid when it is generated are the only real options today. We research new energy uses, envisioning a global edge computing infrastructure powered by these excess energy. We investigate how computing can be moved along the infrastructure following the sun and wind paths.\u00a0\u00a0\u00a0<\/p>\n<\/div>\n\n\n\n

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ARXIV SURPLUS<\/a><\/div>\n\n\n\n
Patent<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n
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Synchronization in Wireless Networks<\/h2>\n\n\n\n

In the last years we have addressed technical challenges to improve the performance of wireless networks. In particular we looked at how to keep node’s synchronization while minimizing the impact in the energy consumption and duty cycle of the devices that need to synchronize. <\/p>\n\n\n\n

Smart Clocks<\/h2>\n\n\n\n
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