A Priority-Based Cross-Layer Design for Future VANETs through Full-Duplex Technology

05/12/2020
by   Junwei Zang, et al.
0

Among all requirements for vehicle-to-everything (V2X) communications, successful delivery of packets with small delay is of the highest significance. Especially, the delivery of a message before a potential accident (i.e. emergency message) should be guaranteed. In this work, we propose a novel cross-layer design to enhance the delivery of emergency messages so that accidents can be further avoided. Particularly, in the PHY layer, imperfect full-duplex (FD) simultaneous transmitting and sensing is analysed and dynamic thresholds for determining the channel status before and during transmissions are mathematically formulated. Then a novel FD MAC protocol, named priority-based multiple access (PBMA), based on prioritised messaging between different vehicles is proposed. Average collision probability, collision duration, waiting time as well as successful delivery rate of the system are formulated too. The delivery performance of emergency messages is also mathematically derived. In addition, comparisons have been made among three different mechanisms. Benchmark is the DSRC standard which uses half-duplex (HD) technology with enhanced distributed channel access (EDCA) protocol. We also compare our proposed protocol with FD EDCA. Simulations have verified the accuracy of our analysis. They have also illustrated the delivery of emergency messages has been enhanced by deploying our proposed design.

READ FULL TEXT
research
03/04/2020

Sporadic Ultra-Time-Critical Crowd Messaging in V2X

Life-critical warning message, abbreviated as warning message, is a spec...
research
03/12/2018

Efficient Communication over Cellular Networks with Network Coding in Emergency Scenarios

Emergency communications requires reliability and flexibility for disast...
research
12/08/2018

Impact of MQTT Based Sensor Network Architecture on Delivery Delay Time

The purpose of this study is to present two new architectures of the com...
research
03/15/2018

Cross-Layer Designs for Body-to-Body Networks: Adaptive CSMA/CA with Distributed Routing

In this paper, we propose a novel adaptive carrier sense multiple access...
research
06/14/2019

An Improved CF-MAC Protocol for VANET

Vehicular Ad hoc Network (VANET) is one of the emerging research areas i...
research
01/19/2023

The throughput in multi-channel (slotted) ALOHA: large deviations and analysis of bad events

We consider ALOHA and slotted ALOHA protocols as medium access rules for...
research
12/07/2022

Leveraging Priority Thresholds to Improve Equitable Housing Access for Unhoused-at-Risk Youth

Approximately 4.2 million youth and young adults experience homelessness...

Please sign up or login with your details

Forgot password? Click here to reset