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TR 23.730 (SA2)
Study on extended Architecture support
for Cellular Internet of Things

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Rapporteur:  Mr. Jain, Puneet

The present document studies and evaluates the architecture enhancement to support Cellular Internet of Things (CIoT). The scope includes NB-IoT, eMTC, and EC-GSM-IoT.

full Table of Contents for  TR 23.730  Word version:   14.0.0

 

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1  ScopeWord-p. 8
2  References
3  Definitions and abbreviationsWord-p. 9
4  Architectural Considerations and AssumptionsWord-p. 10
5  Key Issues
5.1  Key Issue 1 - Authorization of use of Coverage Enhancement
5.2  Key Issue 2 - Reliable communication service between UE and SCEFWord-p. 11
5.3  Key Issue 3 - Inter RAT idle mode mobility to/from NB-IoT
5.4  Key Issue 4 - Reuse of existing multicast/broadcast architecture
5.5  Key Issue 5 - Reuse of Location Services architecture for Control Plane CIoT EPS optimization
5.6  Key Issue 6 - Inter UE QoS for NB-IoT Control Plane OptimisationWord-p. 17
5.7  Key Issue 7 - CN overload control for data transfer via Control Plane EPS CIoT Optimization
6  SolutionsWord-p. 18
6.1  Solution 1 - Authorization of Coverage Enhancements using Enhanced Coverage Allowed parameter in HSS
6.2  Solution 2: Solution for Authorization of use of Coverage Enhancement - UE configuration
6.3  Solution 3: Subscription based authorization via NASUp
6.4  Solution 4: Subscription based authorization via S1
6.5  Solution 5 - Reliable communication service between UE and SCEF
6.6  Solution 6: Inter RAT idle mode mobility to/from NB-IoT
6.7  Solution 7: Inter UE QoS for NB-IoT Control Plane Optimisation using spare codepoints in Message 3Word-p. 36
6.8  Solution 8 - Back-off timer for data transmission via control plane
6.9  Solution 9 - Overload Start message for control plane data only
6.10  Solution 10 - Enabling and Disabling the Reliable Communication Service between UE and SCEF
6.11  Solution 11 - Reuse of GROUPE for multicast/broadcast of NIDDUp
6.12  Solution 12 - Ensuring UE availability for MBMS reception
6.13  Solution 13 - for Key Issue 5 on Reuse of Location Services architecture for Control Plane CIoT EPS optimization
6.14  Solution 14 - Inter UE QoS for NB-IoT Control Plane Optimisation using a UE context in the eNBWord-p. 56
6.15  Solution 15: Inter UE QoS for NB-IoT Control Plane Optimisation by retrieving the UE context from the MMEWord-p. 59
6.16  Solution 16: Avoid UE sending WB-E-UTRAN capabilities when camping on NB-IoTWord-p. 60
6.17  Solution 17: MBMS reuse with Power Saving functions via potential independent wake up for MBMS user serviceWord-p. 66
6.18  Solution 18: Coverage enhancement for positioningWord-p. 71
7  Overall EvaluationWord-p. 75
8  ConclusionsWord-p. 81
A  Change historyWord-p. 83

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