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Content for TR 25.703 Word version: 12.0.0

0… 4…

4 Description of addressed issues p. 7

4.1 Current Setup and Operation p. 7

4.1.1 Provisioning and Start Up p. 7

4.1.2 Operation p. 8

5 Description of proposed solutions p. 8

6 Open issues p. 9

6.1 Open issue list p. 9

6.1.1 Evaluation p. 10

6.2 Confirmed issues p. 12

7 Issues and potential improvements p. 13

7.1 Issues p. 13

7.1.1 Backhaul Link Reliability and Delay p. 13

7.1.1.1 Evaluation p. 13

7.1.2 Introduction of new closed HNB to a dense deployment leads to LAC replanning (Issue #2) p. 14

7.1.2.1 Use and Change of LACs p. 14

7.1.2.2 LAC changes triggered by new Power Up or Replanning p. 15

7.1.2.3 Number of LACs and Scaling p. 16

7.1.2.4 Evaluation p. 17

7.2 Potential improvements p. 18

7.2.1 Mitigation of CBC - HNB-GW message size and associated impacts p. 18

7.2.1.1 A 'Broadcast All' method for Emergency Cell Broadcast to HNBs p. 19

7.2.1.1.1 Current addressing practice p. 19

7.2.1.1.2 Addition of a Broadcast All Method p. 19

7.2.1.1.3 Backwards compatibility p. 20

7.2.1.1.4 Messages from HNB / HNB-GW towards the CBC p. 20

7.2.1.2 A grouping method for emergency HNBs p. 21

7.2.1.2.1 Current addressing practice p. 21

7.2.1.2.2 Addition of a Grouping Method p. 21

7.2.1.2.3 Provisioning of a Grouping Parameter p. 22

7.2.1.2.4 Messages from CN towards HNB-GW | RNC p. 22

7.2.1.2.5 Messages from HNB / HNB-GW towards the CBC p. 22

7.2.1.2.6 Level of granularity p. 22

7.2.1.2.7 LTE compatibility p. 22

7.2.1.2.8 Backwards compatibility with existing practice p. 23

7.2.1.3 Evaluation p. 23

8 Conclusions p. 24

$ Change History p. 25