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Content for TS 28.627 Word version: 18.0.0

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B.1 General B.2 Monitoring of UE distribution

4 Concepts and background p. 7

4.1 Overview p. 7

4.2 Self-Optimization Concept p. 9

4.2.1 Logical Function Blocks p. 9

4.2.1.1 Self-Optimization Input Monitoring Function (SO_MON_F) p. 9

4.2.1.2 Triggering Optimization Function (TG_F) p. 9

4.2.1.3 Optimization Fallback Function (O_FB_F) p. 9

4.2.1.4 Self-Optimization Progress Update Function (SO_PGS_UF) p. 9

4.2.1.5 NRM IRP Update Function (NRM_UF) p. 9

4.2.1.6 Self-Optimization Monitoring and Management Function (SO_MMF) p. 9

4.2.1.6.1 Self-Optimization Monitoring and Management Function (SO_MMF_NM) p. 9

4.2.1.6.2 Self-Optimization Monitoring and Management Function (SO_MMF_EM) p. 9

4.2.1.7 Load Balancing Function (LB_F) p. 10

4.2.1.8 Interference Control Function (IC_F) p. 10

4.2.1.9 Coverage and Capacity Function (CC_F) p. 10

4.2.1.10 RACH Optimization Function (RACH_F) p. 10

4.2.1.11 HandOver Optimization Function (HO_F) p. 10

4.2.1.12 NM centralized Coverage and Capacity Function (CC_F_NM) p. 10

4.2.1.13 Self-Optimization for AAS Function (SO_AAS_F) p. 10

4.3 SON Coordination Concepts p. 10

5 Business level requirements p. 11

5.0 General p. 11

5.1 Requirements p. 11

5.1.1 Self-Optimization Monitoring and Management p. 11

5.1.2 Load Balancing p. 11

5.1.3 Handover (HO) Parameter optimization p. 12

5.1.4 Interference control p. 12

5.1.5 Coverage and Capacity optimization p. 12

5.1.6 RACH optimization p. 12

5.1.7 SON Coordination p. 12

5.1.8 Active Antenna System (AAS) management p. 13

5.2 Actor roles p. 13

5.3 Telecommunications Resources p. 13

5.4 High-Level use case p. 13

5.4.1 Load Balancing p. 13

5.4.2 Interference control p. 15

5.4.3 Coverage and capacity optimization p. 16

5.4.4 NM centralized Coverage and Capacity Optimization p. 18

5.4.4.0 General p. 18

5.4.4.1 Use case 1: Cell coverage adapting to traffic demand p. 18

5.4.4.2 Use case 2: Coverage and accessibility p. 18

5.4.4.3 Use case 3: LTE coverage holes with underlaid UTRAN/GERAN p. 18

5.4.4.4 Use case 4: LTE Connection failure p. 19

5.4.4.5 Use case 5: Radio link quality p. 21

5.4.5 SON for AAS p. 21

5.4.5.1 General p. 21

5.4.5.2 Use case 1: Cell splitting p. 21

5.4.5.3 Use case 2: Cell Merging p. 22

5.4.5.4 Use case 3: Cell Shaping p. 22

6 Specification level requirements p. 23

6.1 Requirements p. 23

6.1.1 Self-Optimization Monitoring and Management p. 23

6.1.1.1 Management Part p. 23

6.1.2 Load Balancing p. 23

6.1.3 Handover (HO) Parameter optimization p. 23

6.1.3.1 HO failure categorization p. 23

6.1.3.1.1 HO failures due to too late and too early HO triggering p. 23

6.1.3.2 Reducing inefficient use of network resources due to unnecessary HOs p. 25

6.1.3.3 Requirements p. 26

6.1.4 Interference control p. 26

6.1.5 Coverage and capacity optimization p. 26

6.1.6 RACH optimization p. 26

6.1.7 SON Coordination p. 26

6.1.8 NM centralized coverage and capacity optimization p. 27

6.1.9 AAS management p. 27

6.2 Actor roles p. 27

6.3 Telecommunications Resources p. 28

6.4 Use case p. 28

6.4.1 Use case Self-Optimization Monitoring and Management p. 28

6.4.2 Use case Load Balancing Allowed/Prohibited Management p. 28

6.4.3 Use case NM centralized Coverage and Capacity Optimization p. 30

7 Functions and Architecture p. 31

7.1 Self-Optimization Logical Architecture p. 31

7.2 Self-Optimization Reference Model p. 31

A Steps for SON self-optimization Technical Specifications p. 33

B General descriptions related to NM centralized CCO high level use cases p. 34

B.1 General p. 34

B.2 Monitoring of UE distribution p. 35

$ Change History p. 37