Energy consumption of telecommunication access networks

Table of figures Figure 1: General definition of an access network with its components and the needed customer equipment ................................................................. 5 Figure 2: VDSL2-Vectoring access network and customer premises equipment . ............................ 6 Figure 3: HFC access network and customer premises equipment ................................................... 7 Figure 4: FTTH – Point-to-Point access network and customer premises equipment . ............................ 8 Figure 5: FTTH – GPON access network and customer premises equipment .................................... 9 Figure 6: Data of the model region and its six municipalities....................................................... 11 Figure 7: Example region with various population densities .................................................. 12 Figure 8: Georeferenced buildings with allocated street cabinets . ......................................................... 13 Figure 9: Example of the obtained information on HFC network areas. ................................................ 14 Figure 10: Achievable data rate of the different DSL technologies respective to the reach .......................... 15 Figure 11: Used PoP size classes for FTTH – Point-to-Point ................................................. 16 Figure 12: Measured figures on the power consumption of different router models in various modes of operation ........................................ 18 Figure 13: Measured figures on the power consumption of different router models in various modes of operation . ................................................. 18 Figure 14: Table of subscribers and connection points per street cabinet – existing and new ones .................. 19 Figure 15: DSLAM size classes and numbers of assigned subscribers per DSLAM street cabinet.......................... 19 Figure 16: Key figures of the power consumption of street cabinets by DSLAM size ................................ 20 Figure 17: Total power consumption of the VDSL2-Vectoring access network and the CPE in the model region . ................................................. 21 Figure 18: Number of fibre nodes depending on the service group size ........................................... 21 Figure 19: Power consumption of amplifier points in a 25/75 % distribution at different service group sizes . .................................................. 22 Figure 20: Number of CMTS chassis and the resulting power consumption including air conditioning etc. at the central office . ................................................. 22 Figure 21: Total power consumption of the HFC access network – amplifier points and central office . .. 23 Figure 22: Power consumption of the customer premises equipment ................................................. 23 Figure 23: Total power consumption of the HFC access network and the customer premises equipment . ....... 23 Figure 24: Number of PoPs in the model region, calculation based on their spatial location ................. 25 Figure 25: Power consumption of the FTTH – Point-to-Point access network ................................... 25 Figure 26: Power consumption of the GPON access network ......................................................... 26 Figure 27: Power consumption of the customer premises equipment ................................................. 26 Figure 28: Total power consumption of the FTTH – Point-to-Point network in the model region ............... 27 Figure 29: Total power consumption of the FTTH – GPON network in the model region ............................ 27 Figure 30: Comparison of the number of active network elements and the power consumption of the examined access technologies ......................... 28 Figure 31: Annual energy consumption and CO 2 emission . ..................................................... 29 Figure 32: Comparison of the energy consumption normalised to the maximal annual transmission volume . .................................... 30 Figure 33: Number of active network elements based on the achievable data rate . ............................ 31 2

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