wireless communication Real-time mobile applications
Barbara Hughes and Vinny Cahill, Wireless Communication Using Real-Time Extensions to the Linux Network Subsystem, Dept. of Computer Science Technical Report, TCD-CS-2006-57, 2006
Dept. of Computer Science Technical Report TCD-CS-2006-57
Timely wireless communication is essential to
allow real-time mobile applications, e.g.,
communication between mobile robots and intervehicle
communication to be realized.
The current IEEE 802.11 ad hoc protocol is unable
to provide real-time communication guarantees due to
its underlying contention-based MAC layer. Our
current research is addressing the implementation of a
time-bounded MAC protocol as a layer above 802.11.
The implementation of a timely MAC protocol requires
predictable and deterministic behavior at the device
driver level, currently unavailable in the Linux
This paper describes real-time extensions to the
Linux operating system to provide real-time
guarantees at the device driver level. To our
knowledge, we are the first to implement a real-time
ORiNOCO driver for real-time Linux. In addition we
provide a low-level evaluation of the timeliness of
packet transmission achievable using IEEE 802.11.
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