A network of transmission reception devices can be used for an indoor location system covering an indoor environment. The network includes a power supply system and a number of transmission reception devices. The power supply system includes a power cable with a power line and a power source configured to supply a voltage to the power line of the power cable. The power cable is arranged in the indoor environment. The transmission reception devices each include a transmission reception unit configured to operate as a stationary unit of the indoor location system and a power receiving unit including a connector configured to mechanically connect the transmission reception device to the power cable and to electrically connect the transmission reception unit to the power line for powering the transmission reception unit. Each transmission reception device is connected to the power cable at a respective stationary position.