There has been extensive modelling of the optical wireless channel, and the optimum modulation scheme for a particular channel is well-understood. However, this modelling has not taken into account the trade-offs that transmitter and receiver selection usually involve. For a particular type of transmitter, the modulation bandwidth and available power are closely related, as are receiver bandwidth, active area and sensitivity. In this paper, we present a design approach that takes this device selection into account.

One-way delay (OWD) is the transmission time of the network packet from the first to the last bit from the sender node to the receiver node. The data set presented here was obtained as a result of measurements performed for the paper “Improving the Accuracy of One-Way Delay Measurements”.

One-way delay measurements were performed using three different utilities:

* the utility from the OWAMP protocol;

* first version of our utility, owping1; and

* the new version of our utility, owping2.

Secure cryptographic protocols are indispensable for modern communication systems. It is realized through an encryption process in cryptography. In quantum cryptography, Quantum Key Distribution (QKD) is a widely popular quantum communication scheme that enables two parties to establish a shared secret key that can be used to encrypt and decrypt messages.

We compared the performances of an LwM2M device management protocol implementation and FIWARE’s Ultralight 2.0. In addition to demonstrating the viability of the proposed approach, the obtained results point to mixed advantages/disadvantages of one protocol over the other.