In the industry from production, logistics through several kinds of services, Internet of Things based technologies are one of the biggest inventions in the last couple years. IoT are the network of industry- and common devices, sensors, actuators and almost any kind of device which has embedded electronics. Devices which are connected to the network generate typically just a few bytes of data during the communication. The number of IoT devices are increasing rapidly year by year. Based on current estimations by 2020, there will be 30 billion connected devices all around the world.
Typically, IoT end devices have radio network access. Currently - before the 5G - mobile network operators provide guaranteed and controlled environment with the help of NB-IoT (NarrowBand IoT) and Cat-M1 technologies. During my research I am going to examine these two technologies standardized by 3GPP. They can use the existing LTE network with some changes, for this reason they have several favorable features because they can use already existing functions of the the LTE network. Furthermore, NB-IoT or Cat-M1 based devices can operate on licensed spectrum which is a huge advantage against other rival technologies such as LoRa, Sigfox, etc.
In order to provide adequate service quality for the IoT devices, there is a need for extensive measurements and examinations on the NB-IoT and Cat-M1 capable devices and networks. For the present, there are just a few suggestions available on how to measure a specfic parameter or what are the most relevant KPI's (Key Parameter Indicator) for the proper operating of these networks, although these are not uniformly accepted procedures. Low power consumption is one of the most important demands of the IoT devices, so long battery life time can be achieved without any intervention.
In my essay I am going to examine the data traffic characteristics of the current IoT use-cases, how often and which amount of data is needed in different applications. I will plan and execute measurements about some of the use-cases, after that, examine the power consumption of the devices for the different data characteristics and define configurations to minimize this requirement. In conclusion, I estimate the battery life time of the IoT devices with specific configurations based on prior measurements.