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Content for  TR 38.875  Word version:  17.0.0

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1…   6… 
6 Evaluation methodology  7 UE complexity reduction features  8 UE power saving features  9 Coverage recovery  10 Definition and constraining of reduced capabilities  11 UE identification and access restrictions  12 Impact to network capacity and spectral efficiency  13 Conclusions and recommendations  A UE power saving results  B PDCCH blocking rate results  C Link budget evaluation results  D System-level simulation evaluation results  E Company inputs to power saving evaluation in RAN2  $ Change history 

 

6  Evaluation methodology  p. 9

6.1  Evaluation methodology for UE complexity reduction  p. 9

6.2  Evaluation methodology for UE power saving  p. 10

6.3  Evaluation methodology for coverage recovery  p. 14

6.4  Evaluation methodology for network capacity and spectral efficiency  p. 16

7  UE complexity reduction features  p. 17

7.1  Introduction to UE complexity reduction features  p. 17

7.2  Reduced number of UE Rx/Tx antennas  p. 17

7.2.1  Description of feature  p. 17

7.2.2  Analysis of UE complexity reduction  p. 18

7.2.3  Analysis of performance impacts  p. 20

7.2.4  Analysis of coexistence with legacy UEs  p. 20

7.2.5  Analysis of specification impacts  p. 21

7.3  UE bandwidth reduction  p. 21

7.3.1  Description of feature  p. 21

7.3.2  Analysis of UE complexity reduction  p. 21

7.3.3  Analysis of performance impacts  p. 22

7.3.4  Analysis of coexistence with legacy UEs  p. 23

7.3.5  Analysis of specification impacts  p. 23

7.4  Half-duplex FDD operation  p. 23

7.4.1  Description of feature  p. 23

7.4.2  Analysis of UE complexity reduction  p. 24

7.4.3  Analysis of performance impacts  p. 24

7.4.4  Analysis of coexistence with legacy UEs  p. 25

7.4.5  Analysis of specification impacts  p. 25

7.5  Relaxed UE processing time  p. 25

7.5.1  Description of feature  p. 25

7.5.2  Analysis of UE complexity reduction  p. 26

7.5.3  Analysis of performance impacts  p. 27

7.5.4  Analysis of coexistence with legacy UEs  p. 27

7.5.5  Analysis of specification impacts  p. 27

7.6  Relaxed maximum number of MIMO layers  p. 28

7.6.1  Description of feature  p. 28

7.6.2  Analysis of UE complexity reduction  p. 28

7.6.3  Analysis of performance impacts  p. 29

7.6.4  Analysis of coexistence with legacy UEs  p. 29

7.6.5  Analysis of specification impacts  p. 29

7.7  Relaxed maximum modulation order  p. 29

7.7.1  Description of feature  p. 29

7.7.2  Analysis of UE complexity reduction  p. 30

7.7.3  Analysis of performance impacts  p. 31

7.7.4  Analysis of coexistence with legacy UEs  p. 32

7.7.5  Analysis of specification impacts  p. 32

7.8  Combinations of UE complexity reduction features  p. 32

7.8.1  Description of feature combinations  p. 32

7.8.2  Analysis of UE complexity reduction  p. 32

7.8.3  Analysis of performance impacts  p. 33

7.8.4  Analysis of coexistence with legacy UEs  p. 34

7.8.5  Analysis of specification impacts  p. 34

8  UE power saving features  p. 34

8.1  Introduction to UE power saving features  p. 34

8.2  Reduced PDCCH monitoring  p. 35

8.2.1  Description of feature  p. 35

8.2.2  Analysis of UE power saving  p. 35

8.2.3  Analysis of performance impacts  p. 39

8.2.4  Analysis of coexistence with legacy UEs  p. 48

8.2.5  Analysis of specification impacts  p. 48

8.3  Extended DRX for RRC Inactive and/or Idle  p. 48

8.3.1  Description of feature  p. 48

8.3.2  Analysis of UE power saving  p. 49

8.3.3  Analysis of upper and lower bound of extended DRX cycles  p. 49

8.3.4  Analysis of mechanisms for extended DRX  p. 50

8.4  RRM relaxation for stationary devices  p. 51

8.4.1  Description of feature  p. 51

8.4.2  RRM relaxation in RRC_IDLE and RRC_INACTIVE  p. 51

8.4.3  RRM relaxation in RRC_CONNECTED  p. 54

8.4.4  Analysis of UE power saving  p. 55

9  Coverage recovery  p. 56

9.0  Introduction to coverage recovery  p. 56

9.1  Coverage recovery evaluation  p. 56

9.1.1  Urban scenario at 2.6 GHz  p. 56

9.1.2  Rural scenario at 0.7 GHz  p. 58

9.1.3  Urban scenario at 4 GHz  p. 60

9.1.4  Indoor scenario at 28 GHz  p. 62

9.1.5  Summary of coverage recovery evaluation  p. 64

9.2  Coverage recovery for PUSCH  p. 65

9.2.1  Description of coverage recovery features  p. 65

9.2.2  Analysis of coexistence with legacy UEs  p. 65

9.2.3  Analysis of specification impacts  p. 65

9.3  Coverage recovery for PDSCH  p. 65

9.3.1  Description of coverage recovery features  p. 65

9.3.2  Analysis of coexistence with legacy UEs  p. 66

9.3.3  Analysis of specification impacts  p. 66

9.4  Coverage recovery for PDCCH  p. 66

9.4.1  Description of coverage recovery features  p. 66

9.4.2  Analysis of coexistence with legacy UEs  p. 66

9.4.3  Analysis of specification impacts  p. 67

10  Definition and constraining of reduced capabilities  p. 67

10.1  Definition of reduced capabilities  p. 67

10.2  Constraining of reduced capabilities  p. 69

10.2.1  Description of feature  p. 69

11  UE identification and access restrictions  p. 70

11.1  UE identification  p. 70

11.1.1  Description of feature  p. 70

11.2  Access restrictions  p. 75

11.2.1  Description of feature  p. 75

11.2.2  Cell barring  p. 75

11.2.3  Unified access control  p. 75

11.2.4  RRC connection reject  p. 76

11.2.5  Analysis of coexistence with legacy UEs  p. 76

11.2.6  Analysis of specification impacts  p. 76

12  Impact to network capacity and spectral efficiency  p. 76

13  Conclusions and recommendations  p. 77

A  UE power saving results  p. 80

A.1  UE power saving results for FR1  p. 80

A.2  UE power saving results for FR2  p. 83

B  PDCCH blocking rate results  p. 85

B.1  PDCCH blocking rate results for FR1  p. 85

B.2  PDCCH blocking rate results for FR2  p. 92

C  Link budget evaluation results  p. 96

C.1  Urban scenario at 2.6 GHz  p. 96

C.2  Rural scenario at 0.7 GHz  p. 101

C.3  Urban scenario at 4 GHz  p. 106

C.4  Indoor scenario at 28 GHz  p. 110

D  System-level simulation evaluation results  p. 115

E  Company inputs to power saving evaluation in RAN2  p. 124

E.1  Extended DRX for RRC Inactive and/or Idle  p. 124

E.1.1  Power saving evaluation in [8]  p. 124

E.1.2  Power saving evaluation in [9]  p. 126

E.2  RRM relaxation for stationary devices  p. 128

E.2.1  RRM relaxation evaluation in [9]  p. 128

E.2.2  RRM relaxation in idle/inactive mode for serving cell in [10]  p. 128

$  Change history  p. 133

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