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Implementation and evaluation of age of information in status update systems using a 6TiSCH testbed
Citation Link: https://doi.org/10.15480/882.5069
Publikationstyp
Thesis
Date Issued
2023-02-10
Sprache
English
Author(s)
Supervisor
Institut
TORE-DOI
Citation
Project Thesis - Technische Universität Hamburg (2023)
Peer Reviewed
false
This thesis describes the implementation of a testbed to execute and analyze dissemination
schedules in multi-source, multi-monitor, and multi-hop Status Update Systems (SUS)
with respect to Age of Information (AoI). Applications like environmental monitoring or
smart grid require SUS that periodically distribute status information, like sensor data,
of each node to all network participants. Because the nodes use the status information
in decision making, the freshness of information is a key performance indicator, which
can be determined using the performance metric AoI. Dissemination schedules define the
broadcasting and forwarding of the status updates and have therefore a direct impact
on the AoI. In current literature, optimized dissemination schedules are derived using
Minimum Connected Dominating Sets (MCDS). To analyze these theoretical dissemination
schedules on physical Information and Communication Technology (ICT) platforms,
an IPv6 over the Timeslotted Channel Hopping mode of IEEE 802.15.4 (6TiSCH) testbed
is implemented based on the Operating System Contiki NG and executed on OpenMote B
boards. The testbed concept supports scheduling of the slotframes and the implementation
of the application protocol providing the execution of arbitrary dissemination
schedules. Afterwards various setups are evaluated considering different age metrics
and the Packet Delivery Ratio (PDR). The setups differ in their configuration of the
slotframes, the network topology, and the environment interference. The measurement
results prove that the testbed is able to execute dissemination schedules for different
topologies using a timeslotted communication with channel hopping. Furthermore, the
measurement results are used to derive optimized slotframe configurations depending on
the application requirements.
schedules in multi-source, multi-monitor, and multi-hop Status Update Systems (SUS)
with respect to Age of Information (AoI). Applications like environmental monitoring or
smart grid require SUS that periodically distribute status information, like sensor data,
of each node to all network participants. Because the nodes use the status information
in decision making, the freshness of information is a key performance indicator, which
can be determined using the performance metric AoI. Dissemination schedules define the
broadcasting and forwarding of the status updates and have therefore a direct impact
on the AoI. In current literature, optimized dissemination schedules are derived using
Minimum Connected Dominating Sets (MCDS). To analyze these theoretical dissemination
schedules on physical Information and Communication Technology (ICT) platforms,
an IPv6 over the Timeslotted Channel Hopping mode of IEEE 802.15.4 (6TiSCH) testbed
is implemented based on the Operating System Contiki NG and executed on OpenMote B
boards. The testbed concept supports scheduling of the slotframes and the implementation
of the application protocol providing the execution of arbitrary dissemination
schedules. Afterwards various setups are evaluated considering different age metrics
and the Packet Delivery Ratio (PDR). The setups differ in their configuration of the
slotframes, the network topology, and the environment interference. The measurement
results prove that the testbed is able to execute dissemination schedules for different
topologies using a timeslotted communication with channel hopping. Furthermore, the
measurement results are used to derive optimized slotframe configurations depending on
the application requirements.
Subjects
Age of Information (AoI)
Communication Network
6TiSCH
Testbed
Sensor Networks
Wireless Communication
DDC Class
600: Technik
620: Ingenieurwissenschaften
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Implementation and Evaluation of Age of Information in Status Update Systems using a 6TiSCH Testbed.pdf
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