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Content for TR 22.831 Word version: 17.1.0

1… 5…

5.1 Network reselection during disaster - General 5.2 A well-handled disaster begins 5.3 Use case for HPLMN failure with CN still working 5.4 Network reselection during disaster - Non-disaster area 5.5 Network reselection during disaster with previous reject 5.6 Network protection for surge of incoming users during disaster 5.7 Use case on access control for "backup" PLMN 5.8 Return to Home Network after disaster period 5.9 A well-handled disaster ends 5.10 Use case on "Backup" PLMNs for the international roamer

5 Use cases p. 7

5.1 Network reselection during disaster - General p. 7

5.1.1 Description p. 7

5.1.2 Pre-conditions p. 7

5.1.3 Service Flows p. 7

5.1.4 Post-conditions p. 8

5.1.5 Existing features partly or fully covering the use case functionality p. 8

5.1.6 Potential New Requirements needed to support the use case p. 8

5.2 A well-handled disaster begins p. 8

5.2.1 Description p. 8

5.2.2 Pre-conditions p. 8

5.2.3 Service flows p. 8

5.2.4 Post-conditions p. 9

5.2.5 Existing features partly or fully covering the use case functionality p. 9

5.2.6 Potential New Requirements needed to support the use case p. 9

5.3 Use case for HPLMN failure with CN still working p. 9

5.3.1 Description p. 9

5.3.2 Pre-conditions p. 9

5.3.3 Service flow p. 10

5.3.4 Post-conditions p. 10

5.3.5 Existing features partly or fully covering the use case functionality p. 10

5.3.6 Potential New Requirements needed to support the use case p. 10

5.4 Network reselection during disaster - Non-disaster area p. 11

5.4.1 Description p. 11

5.4.2 Pre-conditions p. 11

5.4.3 Service Flows p. 11

5.4.4 Post-conditions p. 11

5.4.5 Existing features partly or fully covering the use case functionality p. 11

5.4.6 Potential New Requirements needed to support the use case p. 11

5.5 Network reselection during disaster with previous reject p. 12

5.5.1 Description p. 12

5.5.2 Pre-conditions p. 12

5.5.3 Service Flows p. 12

5.5.4 Post-conditions p. 12

5.5.5 Existing features partly or fully covering the use case functionality p. 12

5.5.6 Potential New Requirements needed to support the use case p. 13

5.6 Network protection for surge of incoming users during disaster p. 13

5.6.1 Description p. 13

5.6.2 Pre-conditions p. 13

5.6.3 Service Flows p. 13

5.6.4 Post-conditions p. 14

5.6.5 Existing features partly or fully covering the use case functionality p. 14

5.6.6 Potential New Requirements needed to support the use case p. 14

5.7 Use case on access control for "backup" PLMN p. 14

5.7.1 Description p. 14

5.7.2 Pre-conditions p. 14

5.7.3 Service flow p. 14

5.7.4 Post-conditions p. 14

5.7.5 Existing features partly or fully covering the use case functionality p. 15

5.7.6 Potential New Requirements needed to support the use case p. 15

5.8 Return to Home Network after disaster period p. 15

5.8.1 Description p. 15

5.8.2 Pre-conditions p. 15

5.8.3 Service Flows p. 15

5.8.4 Post-conditions p. 15

5.8.5 Existing features partly or fully covering the use case functionality p. 15

5.8.6 Potential New Requirements needed to support the use case p. 16

5.9 A well-handled disaster ends p. 16

5.9.1 Description p. 16

5.9.2 Pre-conditions p. 16

5.9.3 Service flows p. 16

5.9.4 Post-conditions p. 16

5.9.5 Existing features partly or fully covering the use case functionality p. 16

5.9.6 Potential New Requirements needed to support the use case p. 16

5.10 Use case on "Backup" PLMNs for the international roamer p. 16

5.10.1 Description p. 16

5.10.2 Pre-conditions p. 16

5.10.3 Service flow p. 17

5.10.4 Post-conditions p. 17

5.10.5 Existing features partly or fully covering the use case functionality p. 17

5.10.6 Potential New Requirements needed to support the use case p. 18

6 Potential New Consolidated Requirements p. 18

7 Conclusions and Recommendations p. 18

$ Change history p. 19