@inproceedings{Grohmann2021,
title = {Catch Me If You Can: Demonstration of Publicly Remote Controlled Robots},
author = {Andreas I. {Grohmann} and Alexander {Kropp} and Christopher {Lehmann} and Ievgenii A. {Tsokalo} and Frank H. P. {Fitzek}},
year = {2021},
date = {2021-01-09},
booktitle = {2021 IEEE 18th Annual Consumer Communications & Networking Conference
(CCNC) (CCNC 2021)},
address = {Las Vegas, USA},
abstract = {This demonstrator enables remote audiences to control robots within our lab. The purpose is to play a little game in order to show remote control over the public internet. Users are able to interact with the demo remotely through the web interface. This demonstrates an straight forward approach for remote robot operation independent from a specific device. Any current web browser running on a commercial off-the-shelf computer or mobile phone can be used to interact with the demo. However, it also shows the limitations of this kind of robot control. Dependent on the user's location and network connection, different amounts of latency come into play. Within this demo this effects the difficulty, as only fast or precise movements are possible.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}

@inproceedings{Groh2101:Interference,
title = {Interference resilience of Thread: A practical performance evaluation},
author = {Andreas I. {Grohmann} and David {Nophut} and Marek {Sobe} and Adrian {Bretschneider} and Frank H. P. {Fitzek}},
year = {2021},
date = {2021-01-09},
booktitle = {2021 IEEE 18th Annual Consumer Communications & Networking Conference
(CCNC) (CCNC 2021)},
address = {Las Vegas, USA},
abstract = {Currently, most IoT services are hosted centralized
in a cloud. However, they rely on data gathered by numerous
distributed sensors, which require to be connected to these clouds.
At the moment this is realized with non-IP based proprietary
wireless sensor networks that use inflexible networking concepts
and require to be carefully configured.
The Thread protocol, with its implementation OpenThread, is
a new wireless mesh approach to solve this problem. OpenThread
is maintained by the Thread group, which is an organization
supported by almost 300 companies, including Google, Amazon,
and Apple. Its design is based on an IPv6, for seamless integration
in existing IP networks.
This work, after a short a practical overview of the Thread
protocol in general, investigates the network performance in
different interference scenarios based on results from a hardware
testbed, set up in an office building. This testbed is based on
the Nordic Semiconductor nRF52840 System on a Chip (SoC),
running OpenThread from the official github repository. Besides
a thorough examination for round-trip-time (RTT) and losses, a
stability test was performed over five weeks, to see the impact
of interference during business hours. We measured RTTs in
the range of 10 to 100 ms and losses up to 40% depending
on interfering wireless services. Despite its obvious advantages,
from our experimental results, it is evident how some practical
limitations make OpenThread not always a good choice.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}

@inproceedings{Grohmann2020,
title = {SourceShift: Resilient Routing in Highly Dynamic Wireless Mesh Networks},
author = {Andreas I. {Grohmann} and Frank {Gabriel} and Sandra {Zimmermann} and Frank H. P. {Fitzek}},
year = {2020},
date = {2020-04-05},
booktitle = {2020 IEEE Wireless Communications and Networking Conference (WCNC) (IEEE WCNC 2020)},
address = {Seoul, Korea (South)},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}