OFDM Relay Cognitive Radio Multiple Antennas Resource Allocation Full Duplex Spectrum Sensing Synchronization Spectrum Sharing Channel Estimation Interference Cancellation Stochastic Geometry Energy Harvesting Feedback Bi-directional Heterogeneous Networks Equalization HetNet relay networks FBMC Ultra Low Power SC-FDMA TVWS Duplex Reliability CDMA MIMO interference channel capacity in-band full-duplex system interference suppression 5G C-V2V reinforcement learning RSRP weighting non-orthogonal multiple access (NOMA) health care 5G mobile communication indoor positioning Vehicle-to-vehicle communication estimated position overlapping Resource sharing Power allocation multi-access edge computing control overhead hybrid Rat-dependent positioning NR positioning smart factory UFMC Handoff Femtocell QAM CoMP power uncertainty - Computation offloading amplify and forward communication Zigbee body area networks resource block management frame structure WVAN inter user interference GFDM mode selection antenna arrays partial overlap LTE-based V2V resource selection maximum likelihood method Communication range Number of training blocks Vehicular communication Uplink SCMA system Dynamic TDD QR Factorization Metaheuristics FS-NOMA cross-link interference user fairness Multi-user Receiver Mode 3 V2X P-NOMA dynamic HetNet spectrum partitioning DQN D-TDD CLI massive connectivity and 5G networks. OTDOA estimated position updating distributed mode non-orthogonal multiple access Spatial capacity LTE-TDD —Device-to-device (D2D) Location-based overloading
Status : Presented 
Date : 2015-03 
Title : Impacts of Sub Hub on Connectivity of IEEE 802.15.4 in Healthcare Environments 
Authors : Sungwoo Weon, Seokwon Lee, Sooyong Choi, Jang-Won Lee, and Daesik Hong 
Conference : WCNC 2015 
Abstract : In this paper, we consider IEEE 802.15.4 based wireless body area sensor networks (WBASN) in the healthcare environment. Connectivity is a critical constraint in the healthcare environment. In particular, disconnection from a sensor hub is a significant problem that leads to sensor node orphaning. To address this, we propose to use a sub hub designed to enhance WBASN connectivity. The sub hub understudies the original (main) sensor hub and acts to resolve the problems associated with disconnection. We also propose two protocols for use in operating the sub hub. Each protocol prevents the sensor nodes from being orphaned, and forwards data from the sensor nodes to the original sensor hub. In addition, we evaluate the connectivity performance of our proposed protocols and analyze the disconnection tolerance and the number of packet drops. To demonstrate the performances of the proposed protocols, we developed an IEEE 802.15.4 compliant system level simulator with an OPNET Modeler. Simulation results show the individual merits and the demerits of each of the protocols in terms of connectivity. In addition, the energy efficiency of our proposed protocol is evaluated. 
URL : http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7127613 
Download : http://mirinae.yonsei.ac.kr/?module=file...le_srl=343 

Weon, Sungwoo; Lee, Seokwon; Choi, Sooyong; Lee, Jang-Won; Hong, Daesik, "Impacts of sub hub on connectivity of IEEE 802.15.4 in healthcare environments," Wireless Communications and Networking Conference (WCNC), 2015 IEEE , vol., no., pp.1042,1047, 9-12 March 2015
doi: 10.1109/WCNC.2015.7127613
keywords: {Handover;IEEE 802.15 Standards;Measurement;Medical services;Power demand;Protocols},
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7127613&isnumber=7127309

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» [IEEE WCNC] Sungwoo Weon, Seokwon Lee, Sooyong Choi, Jang-Won Lee, and Daesik Hong, "Impacts of Sub Hub on Connectivity of IEEE 802.15.4 in Healthcare Environments", IEEE WCN 2015 file Presented  2015-03