Search

Long Range Wide Area Network (LoRaWAN) has an open specification that defines the Medium Access Control (MAC) protocol for LoRa networks, mainly based on pure-Aloha with beacon option. The LoRaWAN has a star of star topology where end-devices are directly linked to the gateway and up-link packets are primary traffic. This paper~contributes an approach of multi-hop in LoRaWAN. The potential benefits of multi-hop in LoRaWAN are investigated. A RSSI-based trilateration algorithm for graph construction is proposed. The shortest path for multi-hop and forwarding mechanism without local beacon is designed and implemented in simulation. This novel approach is tested in ns-3 simulator and different scenarios are run. Results indicate that multi-hop can decrease the energy consumption of LoRaWAN, by reducing Time on Air and TX power., Comment: There are error and dispute in this report, current approach is withdrawn

Long Range (LoRa) is a wireless communication technology for the Internet of Things (IoT), able to provide wide coverage networking to devices with low power consumption and low data-rate. This paper~proposes and describes a simulation module of LoRa wireless networks, based on models of the LoRa physical and data-link layers, in order to enable simulation-based evaluation of LoRa performance in large-scale networks. The physical layer model uses path loss parameters estimated by way of real measurements performed at different scenarios. The data-link layer model relies on an Aloha-like medium access protocol. Both models for the physical and data-link layers are implemented in a ns-3 module. Behavior and performance of this module are studied by way of a set of experiments that show the consistency of ns-3 simulation and measurements on a real LoRa testbed. Finally, an evaluation of the simulation module scope shows that the time complexity of this module is exponential., Comment: There are error and dispute in this report, current approach is withdrawn

Long Range (LoRa) is a modem technology for wireless communication in the Internet of Things (IoT), which trades off low data-rate for low power consumption. Long Range Wide Area Network (LoRaWAN) has an open specification that determines the Medium Access Control (MAC) protocol for LoRa networks. This paper contributes a simulation module in Network Simulator 3 (ns-3) to evaluate the limitation of LoRaWAN in various metrics. The result shows the performance of LoRaWAN in a simulation environment and a large scale scenario, indicating the feature of flexible propagation range on physical layer, and limited channel capacity on the data-link layer. The feasibility of optimized multi-hop in LoRaWAN is analyzed. Based on the simulation result, a multi-hop mechanism driven by spreading factor is proposed, not only to extend the network coverage but to reduce the channel load. The novel approach takes benefit of the dynamic feature of LoRa and estimates optimized forwarding hops with parameter configuration. The result shows that Time on Air can be significantly decreased., Comment: There are error and dispute in this report, current approach is withdrawn