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Content for  TR 23.882  Word version:  8.0.0

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0…   4…   7.10…   8… 
8 Consolidated architecture  9 Conclusions  A Open Issues  B Summary of different high level architecture proposals  C Summary of different MM concepts  D More detailed descriptions of potential solutions for limiting signalling due to idle mode mobility between E-UTRA and UTRA/GSM  E Mobility between pre-SAE/LTE 3GPP and non 3GPP access systems  F Policy related network Scenarios  G Examples of Operator-Controlled Services  H Signalling charts for combined or separated MME and UPE  I Open issues for the SAE architecture (Informative)  $ Change history 

 

8  Consolidated architecture  p. 159

9  Conclusions  p. 159

A  Open Issues  p. 160

B  Summary of different high level architecture proposals  p. 162

B.0  General  p. 162

B.1  Concept B1  p. 162

B.2  Concept B2  p. 167

C  Summary of different MM concepts  p. 169

D  More detailed descriptions of potential solutions for limiting signalling due to idle mode mobility between E-UTRA and UTRA/GSM  p. 171

D.1  Introduction  p. 171

D.2  Potential Solutions  p. 171

D.2.1  Do Nothing  p. 171

D.2.1.1  Overview  p. 171

D.2.1.2  Advantages  p. 171

D.2.1.3  Drawbacks  p. 171

D.2.2  Common Routeing Area and common SGSN  p. 171

D.2.2.1  Overview  p. 171

D.2.2.2  Advantages  p. 172

D.2.2.3  Drawbacks  p. 172

D.2.3  Common RAN / CN for E-UTRA / UTRA  p. 172

D.2.3.1  Overview  p. 172

D.2.3.2  Advantages  p. 172

D.2.3.3  Drawbacks  p. 172

D.2.4  Equivalent Routeing Areas and SGSN proxy  p. 172

D.2.4.1  Architectural overview  p. 172

D.2.4.2  Concept: Equivalent Routeing Areas  p. 173

D.2.4.3  LERA Management  p. 174

D.2.4.4  Downlink data flow to an "inactive" UE  p. 175

D.2.4.4.1  Solution A  p. 175
D.2.4.4.2  Solution B  p. 177

D.2.4.5  Summary  p. 178

D.2.4.6  Advantages  p. 178

D.2.4.7  Drawbacks  p. 178

D.2.5  UE remains camped on the last used RAT  p. 178

D.2.5.1  Description  p. 178

D.2.5.2  Advantages  p. 179

D.2.5.3  Drawbacks  p. 179

D.2.6  Packet Data Bearer Proxy  p. 179

D.2.6.1  Architectural overview  p. 179

D.2.6.2  Information flow: registration and downlink data transfer  p. 181

D.2.6.3  Advantages  p. 182

D.2.6.4  Drawbacks  p. 182

D.2.7  Inter RAT Resource Allocation  p. 182

D.2.7.1  Architectural overview  p. 182

D.2.7.2  Information flow: registration and uplink/downlink data transfer  p. 184

D.2.7.3  Advantages  p. 185

D.2.7.4  Drawbacks  p. 185

D.2.8  User-IP layer interconnection  p. 185

D.2.8.1  Architectural overview  p. 185

D.2.8.2  Information flow: registration and downlink data transfer  p. 186

D.2.8.3  Advantages  p. 187

D.2.8.4  Drawbacks  p. 188

D.2.9  Combined MME/SGSN  p. 188

D.2.9.1  Architectural overview  p. 188

D.2.9.2  Downlink data flow to an "inactive" UE  p. 189

D.2.9.3  Summary  p. 191

D.2.9.4  Advantages  p. 191

D.2.9.5  Drawbacks  p. 191

D.3  Information Flows  p. 192

D.3.1  Attach to SAE and RAT change to 2G/3G  p. 192

D.3.2  Attach to UMTS and RAT change to LTE  p. 194

D.3.3  Uplink Data Transfer  p. 196

D.3.4  PMM-IDLE and URA-PCH state handling  p. 197

D.3.5  Downlink Data Transfer  p. 198

D.3.6  SGSN (respectively MME) change  p. 199

D.3.7  re-authentication when UE camped within ERA  p. 199

D.4  Potential mechanisms for context retrieval  p. 200

D.4.1  Fully synchronous mechanism  p. 200

D.4.2  MME as master, SGSN as slave  p. 200

D.4.3  Coordination between MME and SGSN  p. 200

D.4.4  Retrieval context from the last access node  p. 200

D.4.5  MME as master, SGSN as slave, plus CRN mechanism  p. 200

D.4.6  Coordination between MME and SGSN, plus CRN mechanism  p. 201

D.4.7  Retrieval context from the last access node, plus CRN mechanism  p. 201

E  Mobility between pre-SAE/LTE 3GPP and non 3GPP access systems  p. 202

E.1  General  p. 202

E.2  Description of mobility between pre-SAE/LTE 3GPP and non 3GPP access systems  p. 202

E.3  Solutions for mobility between pre-SAE/LTE 3GPP and non 3GPP access systems  p. 202

E.3.1  Solution A  p. 202

E.4  Impact on the baseline CN architecture  p. 207

E.4.1  Solution A  p. 207

E.5  Impact on the baseline RAN architecture  p. 208

E.6  Impact on terminals used in the existing architecture  p. 208

E.6.1  Solution A  p. 208

F  Policy related network Scenarios  p. 209

F.1  Scenario 1: Inter-system mobility within the home domain  p. 209

F.2  Scenario 2: Roaming with home forwarding/tunnelling of traffic  p. 209

F.3  Scenario 3: Static roaming agreement  p. 210

F.4  Scenario 4: Roaming with route optimisation of traffic in the visited domain, AF in the home domain  p. 210

F.5  Scenario 5: Roaming with local breakout of traffic in the visited domain, AF in the visited domain  p. 210

F.6  Scenario 6: Roaming with local breakout of some traffic in the visited domain, forwarding/tunnelling other traffic to home network  p. 210

G  Examples of Operator-Controlled Services  p. 211

G.1  Operator-Controlled Rx Services  p. 211

G.2  Operator-Controlled Gx-only Services  p. 211

H  Signalling charts for combined or separated MME and UPE  p. 212

H.1  Alternative B and C architecture scenarios and functional allocation  p. 213

H.1.1  MME and UPE functional allocation  p. 213

H.1.2  Reference point impact from MME/UPE split  p. 213

H.2  Attach including default bearer handling  p. 214

H.3  TA Update without MME or UPE change  p. 216

H.4  Inter eNB Handover in LTE_ACTIVE mode (intra MME and intra UPE)  p. 217

H.5  Inter 3GPP Handover between pre-SAE/LTE and SAE/LTE accesses in LTE_ACTIVE mode  p. 219

H.6  Paging and Service Request  p. 224

H.7  PCRF triggered establishment of Dedicated Bearers  p. 225

H.8  Inter MME and/or inter UPE change, including support for service continuity  p. 228

H.9  Authentication/Re-Authentication  p. 229

H.10  Comparison of Alternatives  p. 229

I  Open issues for the SAE architecture (Informative)  p. 232

$  Change history  p. 234

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