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 p. 11

5.1 Access Control p. 11

5.1.1 Background and motivation p. 11

5.1.2 Analysis p. 12

5.1.2.1 Idle mode p. 13

5.1.2.1.1 SIB3 value tag wrap-around issue p. 13

5.1.2.1.2 Wait Time p. 13

5.1.2.2 Connected mode p. 14

5.1.2.2.1 SIB3 value tag wrap-around issue p. 14

5.1.2.2.2 CELL_PCH/URA_PCH state without seamless transition p. 14

5.1.2.2.2.1 Control of UL data activity p. 14

5.1.2.2.3 CELL_FACH state and CELL_PCH state with seamless transition p. 14

5.1.2.2.3.1 Control of DTCH transmission in CELL_FACH and CELL_PCH seamless transition p. 14

5.1.2.2.4 CELL_DCH state p. 14

5.1.2.2.4.1 DSAC update issue in CELL_DCH state p. 14

5.1.3 Solutions p. 16

5.1.3.1 SIB3 reading p. 16

5.1.3.2 Wait Time enhancements p. 16

5.1.3.3 Control of DTCH transmission based on priorities p. 16

5.1.3.4 CELL_PCH/URA_PCH state without seamless transition p. 18

5.1.3.5 DSAC update in CELL_DCH p. 18

5.1.3.6 MAC back-off timer based on priorities p. 18

5.1.4 Conclusions p. 19

5.2 UL data compression p. 20

5.2.1 Background and motivation p. 20

5.2.2 Analysis p. 21

5.2.3 Solutions p. 21

5.2.3.1 RAN-level compression p. 21

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

5.2.3.1.2 Operations on TCP, UDP and IP headers p. 22

5.2.3.1.3 Details of RAN-level compression methods p. 22

5.2.3.1.3.1 Existing compression methods p. 22

5.2.3.1.3.2 IPDC p. 22

5.2.3.2 Evaluation of solution p. 25

5.2.3.2.1 General aspects of RAN-level compression p. 25

5.2.3.2.2 Evaluation of compression algorithms p. 25

5.2.3.2.2.1 Evaluation setup p. 25

5.2.3.2.2.2 Evaluation results p. 27

5.2.4 Conclusions p. 28

5.3 Improvements to EUL coverage p. 29

5.3.1 Background and motivation p. 29

5.3.2 Analysis p. 29

5.3.2.1 Improvements to UPH measurements p. 29

5.3.2.2 Reconfiguration enhancements p. 29

5.3.2.3 Initial TTI selection p. 30

5.3.3 Solutions p. 31

5.3.3.1 UPH measurements p. 31

5.3.3.2 E-DCH TTI switching p. 31

5.3.3.3 Initial TTI selection enhancements p. 32

5.3.4 Conclusions p. 32

5.4 Enabling high bit rates p. 33

5.4.1 Background and motivation p. 33

5.4.2 CPC and power control p. 34

5.4.2.1 Analysis p. 34

5.4.2.2 Solutions p. 34

5.4.2.3 Evaluations on link level results p. 35

5.4.2.4 Evaluations on system level results p. 35

5.4.3 Grant handling p. 36

5.4.3.1 Analysis p. 36

5.4.3.2 Solutions p. 37

5.4.3.2.1 Time-Limited Grant (TG) p. 37

5.4.3.2.2 Grant detection p. 38

5.4.3.2.3 Fast Scheduling Grant p. 39

5.4.3.2.4 New E-AGCH timing for deactivation p. 41

5.4.4 Deployment scenarios for Lean carrier p. 42

5.4.4.1 Analysis p. 42

5.4.5 Mobility p. 42

5.4.5.1 Analysis p. 42

5.4.5.2 Solutions p. 42

5.4.6 Conclusions p. 43

5.4.6.1 Conclusions on grant handling p. 43

5.4.6.2 Conclusions on Lean carrier p. 44

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

5.5 Reduced UL control channel overhead p. 46

5.5.1 Background and motivation p. 46

5.5.2 Analysis p. 46

5.5.3 Solutions p. 47

5.5.3.1 Description of CQI cycle adaptive solution p. 47

5.5.3.2 Evaluation of CQI cycle adaptive solution p. 47

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

5.5.3.4 Evaluation of CQI report reduction for multi-RABs with speech solution p. 49

5.5.3.5 Description of Serving Grant based E-DPCCH less solution p. 49

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

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

5.5.3.8 Evaluation of blind E-DPDCH detection solution p. 51

5.5.3.9 Description of reduced E-TFCI solution p. 51

5.5.3.10 Evaluation of reduced E-TFCI solution p. 52

5.5.4 Conclusions p. 52

5.6 Low-complexity uplink load balancing p. 53

5.6.1 Background and motivation p. 53

5.6.2 Analysis p. 53

5.6.3 Solutions p. 53

5.6.3.1 Load balancing as extended enhanced serving cell change p. 53

5.6.3.2 Load balancing as extended DC-HSUPA functionality p. 53

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

5.6.4 Conclusions p. 54

5.7 Rate adaptation p. 55

5.7.1 Background and motivation p. 55

5.7.2 Analysis p. 55

5.7.3 Solutions p. 55

5.7.3.1 Description of novel Rate adaptation mechanisms p. 55

5.7.3.2 Soft handover operation with Rate adaptation p. 60

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

5.7.3.2.2 Soft handover for 3-loop Rate adaptation p. 61

5.7.4 Conclusions p. 61

6 Impact on RAN WGs p. 63

6.1 Impact on RAN1 specifications p. 63

6.2 Impact on RAN2 specifications p. 63

6.3 Impact on RAN3 specifications p. 64

6.4 Impact on RAN4 specifications p. 64