Error-Recovery Service for the IEEE 802.11b Protocol

Contemporary wireless networks dramatically enhance data rates and latency to become a key enabler of massive communication among various low-cost devices of limited computational power, standardized by the Long-Term Evolution (LTE) downscaled derivations LTE-M or narrowband Internet of Things (NB IoT), in particular. Specifically, assessment of the physical-layer transmission performance is important for higher-layer protocols determining the extent of the potential error recovery escalation upwards the protocol stack. Thereby, it is needed that the end-points of low processing capacity most efficiently estimate the residual bit error rate (BER) solely determined by the main orthogonal frequency-division multiplexing (OFDM) impairment–carrier frequency offset (CFO), specifically in small cells, where the signal-to-noise ratio is large enough, as well as the OFDM symbol cyclic prefix, preventing inter-symbol interference. However, in contrast to earlier analytical models with computationally demanding estimation of BER from the phase deviation caused by CFO, in this paper, after identifying the optimal sample instant in a power delay profile, we abstract the CFO by equivalent time dispersion (i.e., by additional spreading of the power delay profile that would produce the same BER degradation as the CFO). The proposed BER estimation is verified by means of the industry-standard LTE software simulator.

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Communication protocols and error recovery procedures

10.1145/800272.810898 ◽

1975 ◽

Cited By ~ 3

Author(s):

Gregor V. Bochmann

Keyword(s):

Communication Protocols ◽

Error Recovery

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Defence Medical Rehabilitation Centre (DMRC) COVID-19 Recovery Service

BMJ Military Health ◽

10.1136/bmjmilitary-2020-001681 ◽

2021 ◽

pp. e001681

Author(s):

Oliver O'Sullivan ◽

R Barker-Davies ◽

R Chamley ◽

E Sellon ◽

D Jenkins ◽

...

Keyword(s):

Occupational Medicine ◽

Armed Forces ◽

Acute Illness ◽

Medical Rehabilitation ◽

Rehabilitation Centre ◽

Operational Effectiveness ◽

Mortality And Morbidity ◽

Recovery Service ◽

Significant Mortality

Coronavirus disease 2019 (COVID-19) causes significant mortality and morbidity, with an unknown impact in the medium to long term. Evidence from previous coronavirus epidemics indicates that there is likely to be a substantial burden of disease, potentially even in those with a mild acute illness. The clinical and occupational effects of COVID-19 are likely to impact on the operational effectiveness of the Armed Forces. Collaboration between Defence Primary Healthcare, Defence Secondary Healthcare, Defence Rehabilitation and Defence Occupational Medicine resulted in the Defence Medical Rehabilitation Centre COVID-19 Recovery Service (DCRS). This integrated clinical and occupational pathway uses cardiopulmonary assessment as a cornerstone to identify, diagnose and manage post-COVID-19 pathology.

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