Tech-invite 3GPPspace IETFspace

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Content for TR 25.700 Word version: 12.0.0

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5.1 Access Control 5.2 UL data compression 5.3 Improvements to EUL coverage 5.4 Enabling high bit rates 5.5 Reduced UL control channel overhead 5.6 Low-complexity uplink load balancing 5.7 Rate adaptation 6.1 Impact on RAN1 specifications 6.2 Impact on RAN2 specifications 6.3 Impact on RAN3 specifications 6.4 Impact on RAN4 specifications

5 Study areas Word‑p. 11

5.1 Access Control

5.1.1 Background and motivation

5.1.2 Analysis Word‑p. 12

5.1.2.1 Idle mode Word‑p. 13

5.1.2.1.1 SIB3 value tag wrap-around issue

5.1.2.1.2 Wait Time

5.1.2.2 Connected mode Word‑p. 14

5.1.2.2.1 SIB3 value tag wrap-around issue

5.1.2.2.2 CELL_PCH/URA_PCH state without seamless transition

5.1.2.2.2.1 Control of UL data activity

5.1.2.2.3 CELL_FACH state and CELL_PCH state with seamless transition

5.1.2.2.3.1 Control of DTCH transmission in CELL_FACH and CELL_PCH seamless transition

5.1.2.2.4 CELL_DCH state

5.1.2.2.4.1 DSAC update issue in CELL_DCH state

5.1.3 Solutions Word‑p. 16

5.1.3.1 SIB3 reading

5.1.3.2 Wait Time enhancements

5.1.3.3 Control of DTCH transmission based on priorities

5.1.3.4 CELL_PCH/URA_PCH state without seamless transition Word‑p. 18

5.1.3.5 DSAC update in CELL_DCH

5.1.3.6 MAC back-off timer based on priorities

5.1.4 Conclusions Word‑p. 19

5.2 UL data compression Word‑p. 20

5.2.1 Background and motivation

5.2.2 Analysis Word‑p. 21

5.2.3 Solutions

5.2.3.1 RAN-level compression

5.2.3.1.1 Bytes to be (de-)compressed by RAN-level compression Word‑p. 22

5.2.3.1.2 Operations on TCP, UDP and IP headers

5.2.3.1.3 Details of RAN-level compression methods

5.2.3.1.3.1 Existing compression methods

5.2.3.1.3.2 IPDC

5.2.3.2 Evaluation of solution Word‑p. 25

5.2.3.2.1 General aspects of RAN-level compression

5.2.3.2.2 Evaluation of compression algorithms

5.2.3.2.2.1 Evaluation setup

5.2.3.2.2.2 Evaluation results Word‑p. 27

5.2.4 Conclusions Word‑p. 28

5.3 Improvements to EUL coverage Word‑p. 29

5.3.1 Background and motivation

5.3.2 Analysis

5.3.2.1 Improvements to UPH measurements

5.3.2.2 Reconfiguration enhancements

5.3.2.3 Initial TTI selection Word‑p. 30

5.3.3 Solutions Word‑p. 31

5.3.3.1 UPH measurements

5.3.3.2 E-DCH TTI switching

5.3.3.3 Initial TTI selection enhancements Word‑p. 32

5.3.4 Conclusions

5.4 Enabling high bit rates Word‑p. 33

5.4.1 Background and motivation

5.4.2 CPC and power control Word‑p. 34

5.4.2.1 Analysis

5.4.2.2 Solutions

5.4.2.3 Evaluations on link level results Word‑p. 35

5.4.2.4 Evaluations on system level results

5.4.3 Grant handling Word‑p. 36

5.4.3.1 Analysis

5.4.3.2 Solutions Word‑p. 37

5.4.3.2.1 Time-Limited Grant (TG)

5.4.3.2.2 Grant detection Word‑p. 38

5.4.3.2.3 Fast Scheduling Grant Word‑p. 39

5.4.3.2.4 New E-AGCH timing for deactivation Word‑p. 41

5.4.4 Deployment scenarios for Lean carrier Word‑p. 42

5.4.4.1 Analysis

5.4.5 Mobility

5.4.5.1 Analysis

5.4.5.2 Solutions

5.4.6 Conclusions Word‑p. 43

5.4.6.1 Conclusions on grant handling

5.4.6.2 Conclusions on Lean carrier Word‑p. 44

5.4.6.2.1 Specifications and implementation impacts for Lean carrier operation Word‑p. 45

5.5 Reduced UL control channel overhead Word‑p. 46

5.5.1 Background and motivation

5.5.2 Analysis

5.5.3 Solutions Word‑p. 47

5.5.3.1 Description of CQI cycle adaptive solution

5.5.3.2 Evaluation of CQI cycle adaptive solution

5.5.3.3 Description of CQI report reduction for multi-RABs with speech solution Word‑p. 49

5.5.3.4 Evaluation of CQI report reduction for multi-RABs with speech solution

5.5.3.5 Description of Serving Grant based E-DPCCH less solution

5.5.3.6 Evaluation of Serving Grant based E-DPCCH less solution Word‑p. 50

5.5.3.7 Description of blind E-DPDCH detection solution Word‑p. 51

5.5.3.8 Evaluation of blind E-DPDCH detection solution

5.5.3.9 Description of reduced E-TFCI solution

5.5.3.10 Evaluation of reduced E-TFCI solution Word‑p. 52

5.5.4 Conclusions

5.6 Low-complexity uplink load balancing Word‑p. 53

5.6.1 Background and motivation

5.6.2 Analysis

5.6.3 Solutions

5.6.3.1 Load balancing as extended enhanced serving cell change

5.6.3.2 Load balancing as extended DC-HSUPA functionality

5.6.3.3 Combination of extended eSCC and DC-HSUPA approaches Word‑p. 54

5.6.4 Conclusions

5.7 Rate adaptation Word‑p. 55

5.7.1 Background and motivation

5.7.2 Analysis

5.7.3 Solutions

5.7.3.1 Description of novel Rate adaptation mechanisms

5.7.3.2 Soft handover operation with Rate adaptation Word‑p. 60

5.7.3.2.1 Soft Handover for 2-loop Rate Adaptation Word‑p. 61

5.7.3.2.2 Soft handover for 3-loop Rate adaptation

5.7.4 Conclusions

6 Impact on RAN WGs Word‑p. 63

6.1 Impact on RAN1 specifications

6.2 Impact on RAN2 specifications

6.3 Impact on RAN3 specifications Word‑p. 64

6.4 Impact on RAN4 specifications