Adaptive cooperative communications for enhancing QoS in vehicular networks

In a vehicular network with high mobility, it is challenging to ensure reliable and efficient connections among vehicles and between vehicles and roadside communication units (or infrastructure) such as base stations or WiFi hot spots. In this paper, we propose a method that utilizes cooperative communications for a combined vehicle-to-infrastructure (V2I) with vehicle-to-vehicle (V2V) approach to improving quality of service (QoS) across the vehicular network. In this approach, we have obtained the closed-form expressions of key QoS performances such as outage probability, throughput, energy efficiency, packet delivery ratio, packet loss rate and average end-to-end-delay for different investigated transmission schemes. These performances can be optimized by adaptively selecting appropriate transmission schemes and, as a results, good trade-offs between system reliability and efficiency can also be achieved under various environmental conditions

Early Detection for Optimal-Latency Communications in Multi-Hop Links

Modern wireless machine-to-machine-type communications aim to provide both ultra reliability and low latency, stringent requirements that appear to be mutually exclusive. From the noisy channel coding theorem, we know that reliable communications mandate transmission rates that are lower than the channel capacity. To guarantee arbitrarily-low error probability, this implies the use of messages whose lengths tend to infinity. However, long messages are not suitable for low-latency communications. In this paper, we propose an early-detection scheme for wireless communications under a finite-blocklength regime that employs a sequential-test technique to reduce latency while maintaining reliability. We prove that our scheme leads to an average detection time smaller than the symbol duration. Furthermore, in multi-hop low-traffic or continuous-transmission links, we show that our scheme can reliably detect symbols before the end of their transmission, significantly reducing the latency, while keeping the error probability below a predefined threshold.Comment: 6 pages, to be presented at the International Symposium on Wireless Communication Systems (ISWCS) 2019; Fixed some reference

IntelliWay: Connecting Bicycles to the V2V Network

The IntelliWay device aims to assist cyclists to avoid accidents with motorized vehicles. The project summarizes an innovative device that could provide safer travel for cyclists. Related findings on similar solutions such as bike traffic in heavily populated areas, highway infrastructure, Inter-Car-Communication Systems and the art of merging, have been documented. The project will cover approaches to the initial design and the system specifications for the device with future goals and detailed tasks and schedules