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Content for TR 23.712 Word version: 13.0.0

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5 Possible alternatives for Warning Status Reporting p. 7

5.1 Alternative 1 p. 7

5.1.1 Alternative overview, Existing Warning Status Reporting mechanisms p. 7

5.1.1.1 Pre-release 12 p. 7

5.1.1.2 Release 12 p. 7

5.1.2 Impacts on existing nodes and functionality p. 9

5.1.3 Alternative evaluation p. 9

5.2 Alternative 2 p. 11

5.2.1 Alternative overview, New Warning Status Query and Warning Status Report procedures p. 11

5.2.2 New Warning Status Report requested in Write-Replace Warning Request p. 11

5.2.2.1 Message flow p. 11

5.2.2.2 Message description p. 14

5.2.2.2.1 Requested Number of Reports IE p. 14

5.2.2.2.2 Report format p. 14

5.2.2.3 Interaction with existing reporting mechanisms p. 15

5.2.2.4 Impacts p. 15

5.2.2.4.1 CBC impacts p. 15

5.2.2.4.2 MME impacts p. 15

5.2.2.4.3 eNodeB impacts p. 15

5.2.3 New Warning Status Query procedure p. 16

5.2.3.1 Message flow p. 16

5.2.3.2 Message description p. 17

5.2.3.3 Interaction with existing reporting mechanisms p. 17

5.2.3.4 Impacts p. 17

5.2.3.4.1 CBC impacts p. 17

5.2.3.4.2 MME impacts p. 17

5.2.3.4.3 eNodeB impacts p. 17

5.2.4 Alternative evaluation p. 17

5.3 Alternative 3 p. 19

5.3.1 Alternative overview, Failure Indication p. 19

5.3.1.1 Release 12 p. 19

5.3.1.2 Failure Indication p. 20

5.3.4 Alternative evaluation p. 21

6 Conclusions and recommendations p. 23

6.1 Solution for enhanced Warning Status Reporting p. 23

6.1.1 General p. 23

6.1.2 Requirement 1 p. 23

6.1.3 Requirement 2 p. 23

6.2 Impact on existing 3GPP specifications p. 24

A Release 12 Write-Replace / Stop Warning Indication messages p. 25

A.1 Write-Replace Warning Indication p. 25

A.1.1 Broadcast Completed Area List p. 25

A.2 Stop-Warning-Indication p. 26

A.2.1 Broadcast Cancelled Area List p. 26

A.2.2 Broadcast Empty Area List p. 27

$ Change History p. 28