Tech-invite 3GPPspace IETFspace

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Content for TR 23.888 Word version: 11.0.0

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4 Architectural Considerations p. 14

4.1 Architectural requirements p. 14

4.1A Architecture Principles p. 14

4.2 Architecture Model p. 14

4.3 Architectural Reference Model for MTC p. 16

4.4 Network Elements p. 19

4.4.1 General p. 19

4.4.2 MTC-IWF p. 19

4.4.3 HLR/HSS p. 20

4.4.4 GGSN/PGW p. 20

4.4.5 SGSN/MME p. 20

4.5 Reference Points p. 20

4.5.1 General p. 20

4.5.2 List of Reference Points p. 21

4.5.3 Reference Point Requirements p. 21

4.5.3.1 MTCsp Reference Point Requirements p. 21

4.5.3.2 T4 Reference Point Requirements p. 21

4.5.3.3 T5a/T5b Reference Point Requirements p. 22

4.5.3.4 S6m Reference Point Requirements p. 22

4.6 High Level Functions p. 22

4.6.1 General p. 22

4.7 Authorization and Security p. 22

4.8 Protocol Stacks p. 23

4.8.1 User plane p. 23

4.8.2 Control plane p. 23

4.8.2.1 MTC Server-MTC-IWF MTCsp reference point p. 23

4.8.2.2 MTC Server-SMS SC MTCsms reference point p. 24

5 Description of envisioned System Improvements for Machine Type Communication, use cases p. 24

5.1 Key Issue - Group Based Optimization p. 24

5.1.1 Use case description p. 24

5.1.2 Required Functionality p. 24

5.1.3 Evaluation p. 24

5.2 Key Issue - MTC Devices communicating with one or more MTC Servers p. 24

5.2.1 Use case description p. 24

5.2.2 Required Functionality p. 25

5.3 Key Issue - IP Addressing p. 25

5.3.1 Use case description p. 25

5.3.2 Required Functionality p. 26

5.3.3 Evaluation p. 26

5.4 Key Issue - Small Data Transmission p. 29

5.4.1 Use case description p. 29

5.4.2 Required Functionality p. 29

5.4.3 Evaluation p. 30

5.5 Void

5.6 Key Issue - Low Mobility p. 30

5.6.1 Use case description p. 30

5.6.2 Required Functionality p. 30

5.6.3 Evaluation p. 30

5.7 Key Issue - MTC Subscriptions p. 30

5.7.1 Use case description p. 30

5.7.2 Required Functionality p. 30

5.8 Key Issue - MTC Device Trigger p. 31

5.8.1 Use case description p. 31

5.8.2 Required Functionality p. 32

5.8.3 Evaluation p. 34

5.8.3.1 Comparison of the MTC Device Trigger solutions p. 34

5.8.3.2 Delivery of device trigger information from 3GPP system to UE p. 35

5.8.3.3 Submission of device trigger requests from MTC server to 3GPP system p. 35

5.8.3.4 3GPP system internal handling of device triggers p. 35

5.9 Key Issue -Time Controlled p. 36

5.9.1 Use case description p. 36

5.9.2 Required Functionality p. 37

5.9.3 Evaluation p. 37

5.10 Key Issue - MTC Monitoring p. 37

5.10.1 Use case description p. 37

5.10.2 Required Functionality p. 37

5.11 Key Issue - Decoupling MTC Server from 3GPP Architecture p. 38

5.11.1 Use Case Description p. 38

5.11.2 Required Functionality p. 38

5.12 Key Issue - Signalling Congestion Control p. 38

5.12.1 Use Case Description p. 38

5.12.2 Required Functionality p. 39

5.12.3 Evaluation p. 40

5.12.3.1 General p. 40

5.12.3.2 Evaluation for Congestion Control p. 40

5.12.3.3 Evaluation for Overload Control p. 40

5.12.3.4 Comparison of Each Solution p. 41

5.13 Key Issue - MTC Identifiers p. 43

5.13.1 Use Case Description p. 43

5.13.2 Required Functionality p. 43

5.13.3 Evaluation p. 44

5.14 Key Issue - Potential overload issues caused by Roaming MTC devices p. 44

5.14.1 Use Case Description p. 44

5.14.1.1 What is the likelihood of M2M devices being roamers? p. 44

5.14.1.2 What are the consequences if most M2M devices are roaming? p. 44

5.14.1.2.1 Commercial arrangements p. 44

5.14.1.2.2 Devices that only power-up/attach when they need to do something p. 45

5.14.1.2.3 Failure of "M2M partner" network p. 45

5.14.2 Required Functionality p. 45

5.14.3 Evaluation p. 46

5.14.3.1 Evaluation for M2M "access class barring" functionality p. 46

5.15 Key Issue - Low Power Consumption p. 46

5.15.1 Use case description p. 46

5.15.2 Required Functionality p. 46

5.15.3 Evaluation p. 46