Content for TR 37.869 Word version: 12.0.0
2 References
3 Definitions, symbols and abbreviations
4 General
5 Solutions for Signalling Overhead Reduction
6 Comparison of solutions for Signalling Overhead Reduction
7 Solutions for UE Power Consumption Optimization
8 Comparison of solutions for UE Power Consumption Optimization
9 Conclusions
$ Change History
2 References p. 6
3 Definitions, symbols and abbreviations p. 6
4 General p. 7
5 Solutions for Signalling Overhead Reduction p. 7
5.1 Optimized RRC connection management p. 7
5.1.1 Solution 1a. Signalling reduction by RRC message combining p. 7
5.1.1.1 RAN aspects p. 7
5.1.2 Solution 1b. Lean Service Request Procedure p. 8
5.1.2.1 RAN aspects p. 9
5.2 Control Plane solutions p. 9
5.2.1 Solution 2a. RRC connection without U-plane radio bearer establishment p. 9
5.2.1.1 RAN aspects p. 10
5.2.2 Solution 2b. Downlink small data transfer using RRC message p. 11
5.2.2.1 RAN aspects p. 11
5.3 S1-MME connectionless approaches p. 12
5.3.1 Solution 3a. Small Data Fast Path p. 12
5.3.1.1 RAN aspects p. 12
5.3.2 Solution 3b. Connectionless Data Transmission p. 13
5.3.2.1 RAN aspects p. 14
5.3.3 Solution 3c. RACH-based Small Data Transmission p. 15
5.3.3.1 RAN aspects p. 16
5.4 S1/Iu-only optimizations p. 17
5.4.1 Solution 4a: Stateless Gateway for cost efficient transmission of infrequent or frequent small data p. 17
5.4.1.1 RAN aspects p. 17
5.4.2 Solution 4b: Optimized Service Request procedure for UEs with a single bearer p. 17
5.4.2.1 RAN aspects p. 18
5.5 Keep the UE in connected mode p. 18
6 Comparison of solutions for Signalling Overhead Reduction p. 21
6.1 Traffic models p. 21
6.2 Evaluation metrics p. 22
6.3 Signalling overhead of the different solutions p. 25
6.3.1 LTE case p. 26
6.3.1.1 Byte estimate for involved messages and IEs p. 26
6.3.1.2 Legacy idle->conn->idle solution (and SDDTE solution 4b) p. 27
6.3.1.3 Solution 2a. RRC connection without U-plane radio bearer establishment p. 27
6.3.1.4 Solution 3a. Small Data Fast Path p. 28
6.3.1.5 Solution 3b. Connectionless Data Transmission p. 29
6.3.1.6 Solution 3c. RACH based Small Data Transmission p. 30
6.3.1.7 Handover signalling p. 30
6.4 Impact on System Performance p. 31
7 Solutions for UE Power Consumption Optimization p. 35
7.1 Extended DRX in idle mode p. 35
7.1.1 Solution 1a: Extended DRX in idle mode p. 35
7.1.1.1 RAN aspects p. 35
7.1.2 Solution 1b: Extended DRX using UE Assistance Information p. 36
7.1.2.1 RAN aspects p. 36
7.2 Long DRX cycles in connected mode p. 36
7.3 Transmission delay until better coverage conditions p. 37
7.3.1 Solution 3a: Transmission delay until better coverage conditions p. 37
7.3.1.1 RAN aspects p. 37
7.4 Power Saving State p. 38
8 Comparison of solutions for UE Power Consumption Optimization p. 39
8.1 Traffic models p. 39
8.2 Evaluation metrics p. 39
9 Conclusions p. 41
$ Change History p. 43
