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- 저자 : ( Jen Kuang Lee ) (검색결과 2 건)
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Effect of Packet Loss and Delay on V2X Data Fusion
Tzu-Kuang Lee,Jen-Jee Chen,Yu-Chee Tseng,Cheng-Kuan Lin 한국통신학회 2020 한국통신학회 APNOMS Vol.2020 No.09
Sensing data fusion is one of the most important technologies in autonomous driving. Its performance depends on advance communication technology. Cellular-Vehicle to Everything (C-V2X) initially defined as LTE V2X in 3GPP Release 14 is a solution for vehicle communication that includes Vehicle-to- Infrastructure (V2I), Vehicle-to-person (V2P), and Vehicle-to- Vehicle (V2V). Although 4G LTE and 5G provides high-speed transmission, packet loss and delay are still inevitable. Packet loss and delay affect the safety of autonomous driving, especially for the judgment of emergency. In this paper, we compare the accuracy of data fusion under different rate of packet loss and broadcast frequency on the simulated platform CALAR. And we propose a skill to improve accuracy. Experiments show that the proposed skill significantly alleviates the effect of communication packet loss and delay on the accuracy of V2X data fusion.
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( Cheng Wei Liu ),( Jen Kuang Lee ),( Yen Jun Lai ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
The 75-year-old man underwent percutaneous coronary intervention(PCI) for atherosclerosis coronary artery disease. He had end-staged renal disease with maintenance hemodialysis. Right hemiparesis developed ten hours after the procedure. A computed tomography (CT) of brain demonstrated a hyperdense sucal or cortial lesion in the left frontal lobe (Figure 1). This image fi nding suggested subarachnoid hemorrhage. Dual antiplatelet agents (DAPT) were disrupted transiently. A magnetic resonance imaging (MRI) of brain showed high signal in the left precentral gyrus in diffusion weighted imaging (Figure 2) with corresponding hypointensity in apparent diffusion coeffi ciency imaging (Figure 3), suggestive of an acute infarct. After appropriate treatment for acute ischemic stroke and resuming DAPT immediately, he was discharged uneventfully a week later. Disruption of DAPT signifi cantly increased major cardiovascular events after PCI, especially within 7 days (1). In patients with neurological defi cits after coronary intervention is performed, urgent MRI is necessary to differentiate hemorrhagic strokes from ischemic insults with contrast extravasations from the damaged brainblood barrier. Minimizing window period of DAPT is emphasized in patients with suspicious paradoxical stroke. Reference 1. Mehran R, Baber U, Steg PG, et al. Cessation of dual antiplatelet treatment and cardiac events after percutaneous coronary intervention (PARIS): 2 year results from a prospective observational study. Lancet 382:1714-22, 2013.
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