Evolution of long term narrowband-IoT

Röggla, Thomas; Bazzo, Juliano; Pereira, Orlando dos Reis; Carrillo, Dick; Seki, Jorge

doi:10.1109/intercon.2017.8079717

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…Some LTE functionalities have been removed from NB-IoT UEs to conserve energy including Inter-RAT (Radio Access Technology) mobility, handover mechanisms, public warning functions, dual connectivity, carrier aggregation and emergency calling [91]. Many of the LTE's standard physical channels have been altered for NB-IoT to conserve energy, including limiting modulation techniques to only QPSK or BPSK and fitting both primary and secondary synchronization signals into one Physical Resource Block (PRB) and supporting Transport Block Sizes (TBS) smaller than a single PRB [99]- [102].…”

Section: B Nb-iotmentioning

confidence: 99%

“…Using In-band deployment, NB-IoT signals are assigned an existing PRB on the current LTE band in use. NB-IoT's 180 kHz messages can easily be multiplexed into a 180 kHz LTE PRB, however caution must be exercised to avoid overlap with legacy control and reference signals [99], [105]. Guard-band deployment involves transmitting NB-IoT signals in an existing LTE signal's guard-band.…”

Section: B Nb-iotmentioning

confidence: 99%

“…Stand-alone deployment involves NB-IoT signals being transmitted entirely separately from existing LTE signals. Existing GSM carriers utilize 200 kHz signals, creating a perfect opportunity for organizations to refarm unused GSM channels and decommissioned infrastructure for NB-IoT [12], [99]. However, if the GSM band is utilized for standalone deployment, NB-IoT message bandwidth will increase to 200 kHz.…”

Section: B Nb-iotmentioning

confidence: 99%

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Low-Power Wide-Area Networks: Design Goals, Architecture, Suitability to Use Cases and Research Challenges

et al. 2020

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Previous survey articles on Low-Powered Wide-Area Networks (LPWANs) lack a systematic analysis of the design goals of LPWAN and the design decisions adopted by various commercially available and emerging LPWAN technologies, and no study has analysed how their design decisions impact their ability to meet design goals. Assessing a technology's ability to meet design goals is essential in determining suitable technologies for a given application. To address these gaps, we have analysed six prominent design goals and identified the design decisions used to meet each goal in the eight LPWAN technologies, ranging from technical consideration to business model, and determined which specific technique in a design decision will help meet each goal to the greatest extent. System architecture and specifications are presented for those LPWAN solutions, and their ability to meet each design goal is evaluated. We outline seventeen use cases across twelve domains that require large low power network infrastructure and prioritise each design goal's importance to those applications as Low, Moderate, or High. Using these priorities and each technology's suitability for meeting design goals, we suggest appropriate LPWAN technologies for each use case. Finally, a number of research challenges are presented for current and future technologies. INDEX TERMS Low power wide area network (LPWAN), Internet of Things (IoT), design goals, MAC layer, channel access, long range, scalability, data rate, licensed and unlicensed band, operational lifetime.

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Section: B Nb-iotmentioning

confidence: 99%

Section: B Nb-iotmentioning

confidence: 99%