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