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Enhancing the Performance of Random Access MAC Protocols for Low-cost SDRs

Authors:
Dr.-Ing. Andre Puschmann
Paolo Di Francesco
Dr.-Ing. Mohamed Abdrabou Kalil
Luiz Da Silva
Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel
Typ:
Workshop
Status:
accepted
Date of publication
09/30/2013
Abstract:
Software De ned Radio (SDR) is a technology which facili-
tates experimentation and the practical realization of novel
wireless communication systems. Especially low-cost SDRs,
however, experience high communication delays due to the
connection between the radio hardware and the host com-
puter. This delay hinders the implementation of Medium
Access Control (MAC) protocols. In Carrier Sense Multiple
Access (CSMA) based protocols, especially the Clear Chan-
nel Assessment (CCA) as well as the subsequent channel
access phase are subject to strict temporal constraints. In
this paper, we present two strategies that address both is-
sues and aim to enhance the performance and eciency of
CSMA protocols implemented on low-cost SDRs. The rst
approach employs a dedicated spectrum sensing engine as
a CCA agent for the SDR. The second strategy optimizes
the frame transmission path inside the SDR. Experimental
results indicate that both strategies have a positive impact
on reducing the slot time parameter of the CSMA MAC.
Bibtex
External link
http://dl.acm.org/citation.cfm?id=2505481