Content for TR 23.882 Word version: 8.0.0
4 Architecture Baseline
5 Requirements on the Architecture
6 Scenarios and Solutions
7 Key Architectural Issues
7.1 Key Issue Policy control and Charging
7.2 Key Issue- Roaming with Local Breakout
7.3 Tracking Area
7.4 Radio Access Network - Core Network Functional Split
7.5 Key Issue Inter 3GPP Access System Mobility in Idle State
7.6 Key issue: Limiting signalling due to idle mode mobility between E-UTRA and UTRA/GSM
7.7 Key Issue Intra LTE-Access-System Mobility in LTE_IDLE State
7.8 Key Issue: Inter access system handover
7.9 Key Issue - Default IP Access Service
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4 Architecture Baseline p. 15
4.1 Architecture starting point p. 15
4.2 Architecture for the evolved system - non-roaming case p. 15
4.3 Architecture for the evolved system -roaming cases p. 17
4.4 Architectural principles p. 19
5 Requirements on the Architecture p. 20
6 Scenarios and Solutions p. 22
7 Key Architectural Issues p. 22
7.1 Key Issue Policy control and Charging p. 23
7.1.1 Description of Key Issue Policy control and Charging p. 23
7.1.2 Solution for key issue Policy control and Charging p. 23
7.1.3 Impact on the baseline CN Architecture p. 23
7.1.4 Impact on the baseline RAN Architecture p. 23
7.1.5 Impact on terminals used in the existing architecture p. 23
7.2 Key Issue- Roaming with Local Breakout p. 23
7.2.1 Description of Key Issue - Roaming with Local Breakout p. 23
7.2.2 Solution for key issue - Roaming with Local Breakout p. 24
7.3 Tracking Area p. 27
7.4 Radio Access Network - Core Network Functional Split p. 29
7.5 Key Issue Inter 3GPP Access System Mobility in Idle State p. 31
7.5.1 Description of Key Issue Inter 3GPP Access System Mobility in Idle State p. 31
7.5.2 Solution for key issue Inter 3GPP Access System Mobility in Idle State p. 31
7.5.2.1 Alternative Solution A p. 31
7.5.2.1.1 General p. 31
7.5.2.1.2 Alternative Solution A1 p. 31
7.5.2.1.3 Alternative Solution A2 p. 34
7.5.2.1.4 Impact on the baseline CN Architecture p. 35
7.5.2.1.5 Impact on the baseline RAN Architecture p. 35
7.5.2.1.6 Impact on terminals used in the existing architecture p. 35
7.5.2.2 Alternative Solution B p. 35
7.6 Key issue: Limiting signalling due to idle mode mobility between E-UTRA and UTRA/GSM p. 39
7.7 Key Issue Intra LTE-Access-System Mobility in LTE_IDLE State p. 40
7.7.1 Description of Key Issue Intra LTE-Access-System Mobility in LTE_IDLE State p. 40
7.7.2 Solution for key issue Intra LTE-Access-System Mobility in Idle State p. 40
7.7.2.1 General p. 40
7.7.2.2 Mobility in LTE_IDLE State p. 41
7.7.2.3 Intra LTE-Access-System change in idle state with user context transfer p. 42
7.7.2.4 Intra LTE-Access-System change in idle state with re-attach p. 43
7.7.3 Impact on the baseline CN Architecture p. 43
7.7.4 Impact on the baseline RAN Architecture p. 43
7.7.5 Impact on terminals used in the existing architecture p. 43
7.7.6 Alternative solution p. 43
7.8 Key Issue: Inter access system handover p. 45
7.8.1 Principles and terminologies p. 45
7.8.2 Inter access system handover between 3GPP access systems (UTRAN/Evolved HSPA/GERAN and SAE/LTE 3GPP access system) p. 45
7.8.2.1 Description p. 45
7.8.2.2 Alternative solution A p. 46
7.8.2.2.1 Description p. 46
7.8.2.2.2 Impact on the baseline CN Architecture p. 48
7.8.2.2.3 Impact on the baseline RAN Architecture p. 48
7.8.2.2.4 Impact on terminals used in the existing architecture p. 48
7.8.2.3 Alternative solution B p. 48
7.8.2.3.1 Description p. 48
7.8.2.3.2 Impact on the baseline CN Architecture p. 51
7.8.2.3.3 Impact on the baseline RAN Architecture p. 51
7.8.2.3.4 Impact on terminals used in the existing architecture p. 51
7.8.2.4 Alternative solution C p. 51
7.8.2.4.1 Description p. 51
7.8.2.4.2 Impact on baseline CN Architecture p. 53
7.8.2.4.3 Impact on baseline RAN Architecture p. 54
7.8.2.4.4 Impact on terminals used in the existing architecture p. 54
7.8.2.5 Alternative solution D p. 54
7.8.2.5.1 Description p. 54
7.8.2.5.2 Impact on baseline CN Architecture p. 56
7.8.2.5.3 Impact on baseline RAN Architecture p. 56
7.8.2.5.4 Impact on terminals used in the existing architecture p. 56
7.8.2.6 Comparison of Handover Flows p. 56
7.8.3 Inter access system handover between 3GPP and non 3GPP access systems p. 56
7.8.3.1 Description of key issue - Inter access system handover between 3GPP and non-3GPP access systems p. 56
7.8.3.2 Solution of key issue - Inter access system handover between 3GPP and non-3GPP access systems p. 57
7.8.3.2.1 Relationship with SAE architecture p. 57
7.8.3.2.2 Additional solution aspects p. 59
7.8.3.2.3 MIP version implications p. 59
7.8.3.2.4 Use of local mobility protocols p. 60
7.8.3.3 Comparison of different mobility management schemes p. 60
7.9 Key Issue - Default IP Access Service p. 63
