kumoh national institute of technology
Networked Systems Lab.

NSL Seminar

NSL > Education> NSL Seminar
Multi-Hop LoRa Networks Enabled by Concurrent Transmission
By : ȫ
Date : 2018-08-06
Views : 60

Multi-Hop LoRa Networks Enabled by Concurrent Transmission
CHUN-HAO LIAO, GUIBING ZHU, DAIKI KUWABARA, MAKOTO SUZUKI, AND HIROYUKI MORIKAWA/IEEE Access

ABSTRACT In this paper, we strive to construct an efcient multi-hop network based on the sub-GHz lowpower
wide-area technology. Specically, we investigate the combination of LoRa, a physical-layer standard
that can provide several-kilometer outdoor coverage, and concurrent transmission (CT), a recently proposed
multi-hop protocol that can signicantly improve the network efciency. The main contributions of this paper
are threefold. 1) Since the CT enhances the network efciency by allowing synchronized packet collisions,
the performance of the physical-layer receiver under such packet collisions needs to be carefully examined
to ensure the network reliability. We rst extensively evaluate the LoRa receiver performance under CT to
verify that LoRa is compatible to CT. Specically, we nd that, due to the time-domain and frequencydomain
energy spreading effect, LoRa is robust to the packet collisions resulting from CT. 2) We further
nd the receiver performance under CT can be further improved by introducing timing offsets between the
relaying packets. In view of this, we propose a timing delay insertion method, the offset-CT method, that
adds random timing delay before the packets while preventing the timing offset from diverging over the
multi-hop network. 3) We conduct proof-of-concept experiments to demonstrate the feasibility of CT-based
LoRa multi-hop network and the performance improvement brought by the proposed offset-CT method.
Attachments
Attachment 1:   ÷ 08048465.pdf(3.1MB)  
 
(Total:665 articles / page:1/67 )
List
No. Subject By Date Views
665  An Intelligent Traffic Load Prediction-Based Ada.. Ade Pitra Hermawan 2019-03-15 12
664  Connecting Intelligent Things in Smart Hospitals Using.. mohtasin golam 2019-03-15 15
663  Monitoring of Large-Area IoT Sensors Using a LoRa Wire.. ȣ 2019-03-08 70
662  Artificial Intelligence for Cloud-Assisted Smart Facto.. ġ 2019-03-08 36
661  A Survey on Cluster-Based Routing Protocols for Unmann.. Hasnat 2019-02-26 97
660  Energy-aware Real-time Routing for Large-scale Industr.. DAMIAN TITA 2019-02-22 27
659  Fog-Empowered Anomaly Detection in IoT Using Hyperelli.. Riesa Krisna Astuti 2019-02-15 51
658  Positioning of UAVs for Throughput Maximization in Sof.. Muhammad Taufiq Rama 2019-02-15 48
657  DroneNetX: Network Reconstruction Through Connectivity.. Heidy Indrayani 2019-02-11 30
656  Neighbor- Based Dynamic Connectivity Factor Routing Pr.. Nita Hidayati 2019-02-11 43
Search