Channel access procedures of the state-of-the-art cellular standards create a significant overhead for small messages transmitted by Internet of Things (IoT) devices. As IoT becomes a major source of traffic for next-generation wireless …
Existing cellular infrastructures have to be revisited for emerging machine-to-machine (M2M) traffic as semi-synchronized M2M arrivals may create a significant congestion resulting in a high access delay. In such a case, there is a strong need for …
As the technology behind autonomous underwater vehicles (AUV) becomes more feasible, it is possible to use fleets of AUVs for coordinated missions such as area mapping, surveillance, etc. The AUVs are typically sent by a central node such as a …
Rapid growth of machine-to-machine (M2M) communications necessitates the reevaluation of the Long Term Evolution-Advanced (LTE-A) performance, since the current standard is not optimized for intensive M2M traffic. A serious issue is that massive M2M …
The current LTE-Advanced (LTE-A) standard has been designed for human-generated traffic but it has to be adapted for machine-to-machine (M2M) communications due to the expanding Internet of Things (IoT) market. Although most M2M devices infrequently …
We analyze the performance of the CSMA protocol under propagation delays that are comparable with packet transmission times. We propose a semi-Markov model for the 2-node CSMA channel. For the 2-node case, the capacity reduces to 40% of the …