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Content for TR 23.769 Word version: 13.0.0

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5 Key Issues and Solutions p. 7

5.1 Message delivery to a group of devices p. 7

5.1.1 Description p. 7

5.1.2 Architectural Requirements p. 7

5.1.3 Solutions p. 8

5.1.3.1 Solution: Group based messaging using cell broadcast p. 8

5.1.3.1.1 General p. 8

5.1.3.1.2 Impacts on existing nodes and functionality p. 11

5.1.3.1.3 Solution evaluation p. 12

5.1.3.2 Solution: Group message delivery using MBMS p. 13

5.1.3.2.1 General p. 13

5.1.3.2.2 Impacts on existing nodes and functionality p. 16

5.1.3.2.3 Solution evaluation p. 16

5.1.3.3 Solution: Delivery of messaging to a group using PDN connection(s) p. 16

5.1.3.3.1 General p. 16

5.1.3.3.2 Impacts on existing nodes and functionality p. 23

5.1.3.3.3 Solution evaluation p. 24

5.1.3.4 Solution: T4 message delivery to a group of devices p. 24

5.1.3.4.1 General p. 24

5.1.3.4.2 Impacts on existing nodes and functionality p. 26

5.1.3.4.3 Solution evaluation p. 26

5.1.4 Overall evaluation p. 26

5.2 Selection of delivery mechanisms for messaging to a group p. 28

5.2.1 Description p. 28

5.2.2 Architectural Requirements p. 29

5.2.3 Solutions p. 29

5.2.3.1 Solution: <Solution Title> p. 29

5.2.3.1.1 General p. 29

5.2.3.1.2 Impacts on existing nodes and functionality p. 29

5.2.3.1.3 Solution evaluation p. 30

5.2.4 Overall evaluation p. 30

5.3 Key issue - Group based Policy Control p. 30

5.3.1 Description p. 30

5.3.2 Architectural Requirements p. 30

5.3.2.1 Architectural assumptions and limitations p. 30

5.3.2.2 Overall architectural requirements p. 31

5.3.3 Solutions p. 31

5.3.4 Overall evaluation p. 31

5.4 Key issue - "Group-specific NAS Level Congestion Control" p. 31

5.4.1 Description p. 31

5.4.2 Architectural Requirements p. 31

5.4.3 Solutions p. 32

5.4.3.1 NAS Level Congestion Control based on APN and group identifier p. 32

5.4.3.1.1 General p. 32

5.4.3.1.2 Impacts on existing nodes and functionality p. 33

5.4.3.1.3 Solution Evaluation p. 33

5.4.4 Overall evaluation p. 33

5.5 Key issue - Group based addressing and identifiers p. 33

5.5.1 Description p. 33

5.5.2 Architectural Requirements p. 33

5.5.3 Solutions p. 34

5.5.3.1 Solution 1: Group based addressing by SCS/AS and identifying group members within a PLMN p. 34

5.5.3.1.1 General p. 34

5.5.3.1.2 Procedure flows p. 35

5.5.3.1.3 Impacts on existing nodes and functionality p. 36

5.5.3.1.4 Solution evaluation p. 36

5.5.4 Overall evaluation p. 36

6 Conclusions p. 37

6.1 Conclusions p. 37

$ Change History p. 38