Talks and Poster Presentations (with Proceedings-Entry):
A. Alonso, C. Mecklenbräuker:
"Effects of co-located transmissions in the performance of DCC IEEE802.11p MAC and Self-Organizing TDMA for VANETs";
Talk: 5th COST IC1004 Management Committee and Scientific Meeting,
- 09-26-2012; in: "Proceeding 5th MC and Sceintific Meeting COST IC1004",
IEEE802.11p MAC (Medium Access Control)
protocol has drawbacks when it comes to scheduling
safety-related data. An enhancement has been proposed
by the European Telecommunications Standards Institute
(ETSI), decentralized congestion control (DCC) mechanism.
Implemented on the MAC Layer, it leads to improve
the priority channel access under high load scenarios.
Although, self-organizing time division multiple access
(SoTDMA) clearly defines a suitable alternative for road
traffic safety applications. It copes with low and predictable
delay constraints. Still both MAC protocols experience colocated
transmissions, which affect their performance. Our
contribution presents a comparative study of the effects
of co-located transmissions in the performance of DCC
IEEE802.11p MAC protocol and SoTDMA for vehicular
ad-hoc networks (VANETs). In order to evaluate their
impact, new performance indicators are defined, awareness
and emergencency coverage and their evolution in time is
studied. Results show that for DCC IEEE802.11p MAC
edge nodes, both coverage ranges are narrowed in case of
co-located transmissions or cancelled due to the excessive
back-off. On the other hand DCC IEEE802.11p MAC
centre nodes and SoTDMA results show more reliable
performance where coverage ranges are narrowed in case
of co-located transmissions but never cancelled.
Vehicular communications, MAC Layer, Safety-related data, DCC IEEE802.11p MAC, STDMA, co-located transmissions
Electronic version of the publication:
Created from the Publication Database of the Vienna University of Technology.