Energy consumption of telecommunication access networks

6 Data analysis and interpretation The number of active network elements for the three access technologies was determined as described in Chapter 6. 6.1 Customer premises equipment In order to be able to calculate the power consumption of the access technologies, in addition to the information on the respective access network, data on the power consumption of the customer premises equipment is also required. For this, exemplary measurements were carried out for one router device per access technology. Furthermore, technical specifications and information from equipment manufacturers and network operators were combined to determine the average power consumption of the different devices. On all devices, the power consumption was measured in different operation modes. In the first mode, an internet connection is established, the WLAN/WiFi network is activated and all LAN-Ports are connected to active computers, but no data is transmitted via one of the interfaces. In the second mode, only an internet connection is established. The other interfaces are switched off. An internet connection and a WLAN/WiFi network is established in the third mode. The fourth mode establishes an internet connection and LAN connections. After these measurements each device is set to mode one and then data is transmitted first via LAN connections and then via WLAN/WiFi connections. The measured figures are shown in Figure 12 and Figure 13. As shown in Figure 12, the power consumption of the AVM Fritzbox 7490 is, in an operational mode, somewhere between 9 watt and 11 watt. Combined with further information from technical specifications of other VDSL routers the average power consumption of VDSL2-Vectoring routers is set to 10 watt per device. As shown in Figure 13, the power consumption of the Technicolor TC7200 cable modem router is, in an operational mode, somewhere between 11.4 watt and 13 watt. Combined with further information from technical specifications and manufacturers cable modem routers the average power consumption of cable modem routers is set to 13 watt per device. AVM Fritzbox 7490 AVM Fritzbox 5490 Fibre Internet connection + LAN-connections +WLAN-connection 9W 11 W Internet connection No LAN; NoWLAN 6W 9W Internet connection No LAN; +WLAN 7 W 9W Internet connection + LAN; NoWLAN 9W 9W Data transmission over LAN 9W 11 W Data transmission over WLAN 11 W 11 W Technicolor TC7.200U MikroTik Router Board RB 951G – Router without modem Internet connection + LAN-connections +WLAN-connection 12.0W 3.2 W Internet connection No LAN; NoWLAN 11.4W 3.0W Internet connection No LAN; +WLAN 11.4W 3.0W Internet connection + LAN; NoWLAN 12.0W 3.2 W Data transmission over LAN 13 W 3.7 W Data transmission over WLAN 13 W 4.0W Figure 12: Measured figures on the power consumption of different router models in various modes of operation. Figure 13: Measured figures on the power consumption of different router models in various modes of operation. The MikroTik router is a router without a modem, e.g. for use behind a fibre ONT. 18