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Content for  TR 23.812  Word version:  11.0.0

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4  Analysis of IMS architecturep. 9

5  Applicability of Overload Control and Load Balancingp. 11

6  Architecture alternativesp. 14

6.1  Architecture alternatives for Load Balancingp. 14

6.1.1  Load Balancing based on Load Detection Functionp. 14

6.1.2  S-CSCF Load Balancing at Initial Registration based on HSSp. 24

6.1.3  Load balancing using IETF SOC Overload Controlp. 24

6.1.4  Load Balancing based on dynamic DNSp. 25

6.1.5  Registration independent Serving Node Load Balancing based on HSSp. 28

6.2  Architecture alternatives for Overload Controlp. 30

6.2.1  P-CSCF Overload Controlp. 30

6.2.2  S-CSCF Overload Controlp. 34

6.2.3  Overload Control based on GOCAPp. 35

6.2.4  Overload Control based on IETF SOC WG solution as described in draft-ietf-soc-overload-control-01p. 36

6.2.5  Overload Control based on IETF SOC WG solution as described in draft-ietf-soc-load-control-event-packagep. 38

6.2.6  High Level Summaryp. 40

6.3  S-CSCF re-selectionp. 41

7  Assessmentp. 49

8  Conclusionp. 59

A  DNS UPDATE Mechanismp. 60

B  IMS Deployment Scenariosp. 61

C  Example Load Information Required collected by LDFp. 63

$  Change historyp. 64


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