OFDM Multiple Antennas Cognitive Radio Relay CDMA Synchronization Channel Estimation Spectrum Sharing Interference Cancellation Resource Allocation Spectrum Sensing Full duplex Neural Networks Stochastic Geometry Equalizer Bi-Directional Feedback Energy Harvesting Heterogeneous Networks Femtocell Device-to-Device (D2D) Dynamic TDD SINR mismatch problem Cell Search Idle cells Ultra-dense small cell networks interference management NOMA FBMC Cross-link interference HetNet Spectral efficiency full-duplex relay full-duplex cellular self-interference cancellation Two-way communications Cognitive relay networks automatic repeat request (ARQ) in-band full-duplex system achievable sum rate MIMO interference to noise ratio transmission capacity (TC) singular value decomposition mode selection outage probability multi-spectral selection diversity OQAM Link adaptation beamforming coexistence Iterative decoder LTE-TDD resource size control UL grant free MU-MIMO GFDM UWB Simultaneous Sensing and Transmission Correlated MIMO bursty traffic model Bi-directional full-duplex Time spreading Heterogeneous channel estimation capability sensing duration LTE-based V2V time-frequency efficiency massive connectivity Preamble Aggregate interference Long Term Evolution-Advanced interference coordination 5G networks Windowing prototype filter TS-W-OFDM Grant-free Transmission Complexity Asynchronous Transmission eigen decomposition interference mitigation pilot signal K-S statistics Vehicle-to-vehicle communication tabu-search Resource management Cooperative systems Singular Vale Decomposition mixed numerology flexible duplex 5G Reliability C-V2V CP-OFDM link reliability non-orthogonal multiple access full-spreading NOMA Vehicle-to-Vehicle Filtered OFDM Coexistence scenarios
Status : Published 
Date : 2017-07 
Title : Latency of Cellular-based V2X: Perspectives on TTI-proportional-latency and TTI-independent-latency 
Authors : Kwonjong Lee, Joonki Kim, Yosub Park, Hanho Wang, and Daesik Hong 
Journal : IEEE Access 
Abstract : Vehicle-to-Everything (V2X) is a form of wireless communication that is extremely sensitive to latency, because the latency is directly related to driving safety. The V2X systems developed so far have been based on the LTE system. However, the conventional LTE system is not able to support the latency requirements of latency-aware V2X. Fortunately, the state-ofthe-art cellular technology standard includes development of latency reduction schemes such as shortened transmission time intervals (TTI) and self-contained subframes. This paper verifies and analyzes the latency of cellular-based V2X with shortened TTI, which is one of the most efficient latency reduction schemes. To verify the feasibility of V2X service, we divide the V2X latency into two types of latency, TTI-independent latency (IL) and TTI-proportional latency (PL). Moreover, using system-level simulations considering additional overhead from shortened TTI, we evaluate the latency of cellular-based V2X systems. Based on this feasibility verification, we then propose cellular-based V2X system design principles in terms of shortened TTI with only one OFDM symbol and while sustaining RRC connection. 
URL : http://ieeexplore.ieee.org/stamp/stamp.j...er=7990497 
Download : https://mirinae.yonsei.ac.kr/?module=fil...le_srl=179 

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» [IEEE Access] Kwonjong Lee, Joonki Kim, Yosub Park, Hanho Wang, and Daesik Hong, "Latency of Cellular-based V2X: Perspectives on TTI-proportional-latency and TTI-independent-latency", IEEE Access, Jul. 2017 file Published  2017-07