Performance Analysis of Receivers using Sector Antennas for Broadcast Vehicular Communications
Artikel i vetenskaplig tidskrift, 2019

In this paper, we analyze a carrier-sense multiple access (CSMA) system with all-to-all broadcast data traffic to assess the performance gain obtained by using multiple sector antennas and a receiver setup that can decode multiple packets simultaneously when packets arrive in narrow angle of arrivals. In the broadcast mode of IEEE 802.11p based vehicle-to-vehicle communications, acknowledgment messages are absent and a fixed contention window is used in medium access. As a result, the probability of multiple vehicles simultaneously transmitting a packet increases with the number of vehicles. In the case of a simultaneous transmission, a receiver with omnidirectional antennas receives power from all the transmitting vehicles and the probability of successfully decoding a packet decreases. This problem can be alleviated by using sector antennas when the simultaneously transmitted packets arrive at a receiver in narrow angle of arrivals. We show through analysis and simulations that the packet success rate (PSR) can be improved significantly by using the sector antennas setup instead of an omnidirectional antenna. Numerical results show that a several fold increase in PSR can be achieved in a setup with four sector antennas compared with an omnidirectional antenna when the density of vehicles is large.

packet success ratio

EDCA

CSMA/CA

sector antennas

dense networks

Broadcast communications

Författare

Keerthi Nagalapur

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Fredrik Brännström

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Erik Ström

Chalmers, Elektroteknik, Kommunikations- och antennsystem

IEEE Transactions on Communications

00906778 (ISSN)

Styrkeområden

Informations- och kommunikationsteknik

Transport

Drivkrafter

Hållbar utveckling

Ämneskategorier

Telekommunikation

Kommunikationssystem

Mer information

Senast uppdaterat

2019-01-07