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Content for TR 21.866 Word version: 15.0.0

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6.1 Potential Solution 1- Energy Efficiency in SON 6.2 Potential Solution 2 - Extended range for normal operating conditions for radio base stations 6.3 Potential Solution 3 - The Energy Efficiency Control Framework 6.4 Potential Solution 4 - Coordinated Energy Saving between RAN resources and Network Links 6.5 Potential Solution 5 - Functional architecture for energy efficient operation of multi-RAT cellular networks 7.1 Definition and Calculation of EE KPI in 3GPP Systems 7.2 Energy Efficiency Control in 3GPP Systems 7.3 Coordinated Energy Saving in RAN and other subsystem in 3GPP Systems 7.4 Power Consumption Reduction at the Site Level 7.5 Energy Efficiency in 3GPP systems with NFV 7.6 Energy Efficiency in Self-Organizing Networks 7.7 Energy Efficiency Achievement by Context Data Analysis

6 Potential Solutions for Energy Efficiency Improvement p. 18

6.1 Potential Solution 1- Energy Efficiency in SON p. 18

6.1.1 General p. 18

6.1.2 Architecture description p. 19

6.1.3 Functional description p. 19

6.1.4 Solution evaluation p. 20

6.2 Potential Solution 2 - Extended range for normal operating conditions for radio base stations p. 20

6.2.2 Architecture description p. 20

6.3 Potential Solution 3 - The Energy Efficiency Control Framework p. 20

6.3.1 General p. 20

6.3.2 Architecture description p. 20

6.3.3 Function description p. 21

6.4 Potential Solution 4 - Coordinated Energy Saving between RAN resources and Network Links p. 23

6.4.1 General p. 23

6.4.2 Architecture description p. 23

6.4.3 Functional description p. 24

6.4.3.1 Possible synergy through synchronized RAN & Fixed access energy saving methods p. 24

6.4.3.2 Elements on the gains on the fixed fiber transmission section (wireless counterpart to be studied and added by relevant experts) p. 25

6.5 Potential Solution 5 - Functional architecture for energy efficient operation of multi-RAT cellular networks p. 26

6.5.1 General p. 26

6.5.2 Functional architecture description p. 26

6.5.3 Exemplary results and implementation descriptions p. 27

6.5.4 Solution evaluation p. 28

7 Conclusions p. 28

7.1 Definition and Calculation of EE KPI in 3GPP Systems p. 28

7.2 Energy Efficiency Control in 3GPP Systems p. 29

7.3 Coordinated Energy Saving in RAN and other subsystem in 3GPP Systems p. 29

7.4 Power Consumption Reduction at the Site Level p. 30

7.5 Energy Efficiency in 3GPP systems with NFV p. 30

7.6 Energy Efficiency in Self-Organizing Networks p. 30

7.7 Energy Efficiency Achievement by Context Data Analysis p. 30

$ Change history p. 31