Results 131 to 140 of about 282 (168)
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Spectrum Sharing Exploiting Spectrum Database for LPWA
2019 Eleventh International Conference on Ubiquitous and Future Networks (ICUFN), 2019In the most of current low power wide area (LPWA), packet collisions of uplink communication are controlled by setting duty cycle (DC), which controls the transmission cycle not to exceed the predefined fixed threshold. However, as the number of LPWA nodes increases, the fixed DC fatally increases the number of packet collisions and degrades the ...
Yudai Yamazaki +4 more
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Autonomous Network Reconstruction Using LPWA for Disaster Prevention
Lecture Notes in Computer ScienceKrishnamoorthy R, Kazuaki Tanaka
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2016 IEEE NetSoft Conference and Workshops (NetSoft), 2016
There are several networking technologies that are being designed for low power operation of IoT devices. We consider a deployment scenario where networks based on IEEE802.11ah and LoRaWAN type of technologies are deployed in a geographical area (such as in a city). In some parts of this area, only one of these networks is available while in some other
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There are several networking technologies that are being designed for low power operation of IoT devices. We consider a deployment scenario where networks based on IEEE802.11ah and LoRaWAN type of technologies are deployed in a geographical area (such as in a city). In some parts of this area, only one of these networks is available while in some other
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Channel Capacity for a Model of Packet Level Index Modulation in LPWA Networks
2021 Twelfth International Conference on Ubiquitous and Future Networks (ICUFN), 2021Packet level index modulation is a modulation scheme that can expand the transmission capacity without changing the existing LPWA (Low Power Wide Area) communication standard. In this paper, we calculate the theoretical capacity of the channel. In this modulation scheme, time is treated as a unit of slots and there are multiple channels that can ...
Riku Yamabe +2 more
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A Survey on Technologies and Challenges of LPWA for Narrowband IoT
2020With the dawn of 5G era worldwide NB-IoT has become an evolving technology of cellular 5G wireless communications. In particular, the mobile operators should ensure secured services and connectivity with higher range of IoT solutions. The existing cellular standards provide poor power-saving capabilities which lead to unsuitable battery requirements ...
Gautami Alagarsamy +2 more
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Pitfalls of LPWA Power Consumption: Hands-On Design of Current Probe
2020 12th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT), 2020The unique opportunities introduced by the emerging Industrial Internet of Things (IIoT) applications have accelerated the momentum of the massive Machine-Type Communications (mMTC) worldwide. As the number of already deployed Low-Power Wide-Area (LPWA) applications growth exponentially over the last decade, new open challenges started to be discussed ...
Radek Mozny +5 more
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Beyond LoRa and NB-IoT: Proposals for Future LPWA Systems [PDF]
2019 European Conference on Networks and Communications (EuCNC), 2019 This paper proposes areas of improvement for Low Power Wide Area (LPWA) solutions. After recalling the rationale of these systems, it summarizes the main challenges of existing solutions and proposes various improvements at PHY and MAC layer that were investigated in context of the EPHYL project.
Guillaume Vivier +2 more
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LTE-LPWA networks for IoT applications
2016 International Conference on Information and Communication Technology Convergence (ICTC), 2016Low Power Wide Area (LPWA) networks are characterized by support for long range operation and devices with low power and low throughput requirements. We consider a specific type of LPWA network (see LoRaWAN [2] for an example) where uplink packets sent from end devices are received by multiple intermediate gateways and forwarded to a network server. In
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Demand Collection System using LPWA for Senior Transportation with Volunteer
2020 IEEE International Conference on Pervasive Computing and Communications Workshops (PerCom Workshops), 2020Recently, the transportation means of the elderly have been insufficient due to aging and depopulation, therefore, the area volunteers have provided the demand-responsive transport (DRT) for seniors such as senior transportation service and demand bus. However, the demands collection via telephone or mobile applications has problems: the telephone call
Yuya Sano +4 more
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A Basic Study on Emergency Communication System for Disaster Using LPWA
2019When disasters occur, there is a high possibility of road collapse, communication disruption, blackouts in the mountain area compared to the flat ground. We considered the use of LPWA as an emergency communication means in mountain areas. Mountains are a shield for radio waves, but we plan to expand communication range by installing a relay server of ...
Hiroaki Yuze, Shinichi Nabeta
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