6,152 research outputs found
Latency Analysis of Systems with Multiple Interfaces for Ultra-Reliable M2M Communication
One of the ways to satisfy the requirements of ultra-reliable low latency
communication for mission critical Machine-type Communications (MTC)
applications is to integrate multiple communication interfaces. In order to
estimate the performance in terms of latency and reliability of such an
integrated communication system, we propose an analysis framework that combines
traditional reliability models with technology-specific latency probability
distributions. In our proposed model we demonstrate how failure correlation
between technologies can be taken into account. We show for the considered
scenario with fiber and different cellular technologies how up to 5-nines
reliability can be achieved and how packet splitting can be used to reduce
latency substantially while keeping 4-nines reliability. The model has been
validated through simulation.Comment: Accepted for IEEE SPAWC'1
Ultra-Reliable Low Latency Communication (URLLC) using Interface Diversity
An important ingredient of the future 5G systems will be Ultra-Reliable
Low-Latency Communication (URLLC). A way to offer URLLC without intervention in
the baseband/PHY layer design is to use interface diversity and integrate
multiple communication interfaces, each interface based on a different
technology. In this work, we propose to use coding to seamlessly distribute
coded payload and redundancy data across multiple available communication
interfaces. We formulate an optimization problem to find the payload allocation
weights that maximize the reliability at specific target latency values. In
order to estimate the performance in terms of latency and reliability of such
an integrated communication system, we propose an analysis framework that
combines traditional reliability models with technology-specific latency
probability distributions. Our model is capable to account for failure
correlation among interfaces/technologies. By considering different scenarios,
we find that optimized strategies can in some cases significantly outperform
strategies based on -out-of- erasure codes, where the latter do not
account for the characteristics of the different interfaces. The model has been
validated through simulation and is supported by experimental results.Comment: Accepted for IEEE Transactions on Communication
A Traffic Model for Machine-Type Communications Using Spatial Point Processes
A source traffic model for machine-to-machine communications is presented in
this paper. We consider a model in which devices operate in a regular mode
until they are triggered into an alarm mode by an alarm event. The positions of
devices and events are modeled by means of Poisson point processes, where the
generated traffic by a given device depends on its position and event
positions. We first consider the case where devices and events are static and
devices generate traffic according to a Bernoulli process, where we derive the
total rate from the devices at the base station. We then extend the model by
defining a two-state Markov chain for each device, which allows for devices to
stay in alarm mode for a geometrically distributed holding time. The temporal
characteristics of this model are analyzed via the autocovariance function,
where the effect of event density and mean holding time are shown.Comment: Accepted at the 2017 IEEE 28th Annual International Symposium on
Personal, Indoor, and Mobile Radio Communications (PIMRC) - Workshop WS-07 on
"The Internet of Things (IoT), the Road Ahead: Applications, Challenges, and
Solutions
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