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Content for  TR 36.921  Word version:  18.0.0

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2 References  3 Definitions, symbols and abbreviations  4 General  5 Radio scenarios  6 HeNB RF Aspects  7 Guidance on How to Control HeNB Interference  $ Change History 

 

2  References  p. 6

3  Definitions, symbols and abbreviations  p. 8

3.1  Definitions  p. 8

3.2  Symbols  p. 8

3.3  Abbreviations  p. 8

4  General  p. 8

4.1  Task description  p. 8

4.1.1  HeNB Class definition  p. 8

4.1.2  HeNB measurements and adaptation  p. 8

5  Radio scenarios  p. 9

5.1  Deployment configurations  p. 9

5.2  Interference scenarios  p. 9

6  HeNB RF Aspects  p. 9

7  Guidance on How to Control HeNB Interference  p. 10

7.1  HeNB Measurements  p. 10

7.1.1  Measurements from all cells  p. 10

7.1.2  Measurements to identify surrounding cell layers  p. 10

7.1.3  Measurements from macro cell layer  p. 10

7.1.4  Measurements of other HeNB cells  p. 11

7.2  Control of HeNB Downlink Interference  p. 12

7.2.1  Control Channel Protection  p. 12

7.2.1.1  Time shifting for overlapped carriers with frame time shifting at symbol level  p. 12

7.2.1.1.1  Time shifting at symbol level  p. 12
7.2.1.1.2  Carrier offsetting (possibly in addition to frame time shifting)  p. 14

7.2.1.2  Carrier offsetting or frequency partitioning with per-subband interference estimation  p. 15

7.2.1.3  Control of HeNB downlink interference among neighboring HeNBs control channels by frequency partitioning  p. 17

7.2.2  Data Channel Protection  p. 17

7.2.2.1  Control of HeNB Downlink Interference towards macro eNB data channels by frequency partition  p. 17

7.2.2.2  Control of HeNB Downlink Interference among neighboring HeNBs  p. 18

7.2.2.2.1  Centralized Coordination  p. 18
7.2.2.2.2  Distributed Dynamic Frequency Partitioning  p. 19

7.2.2.3  Control of HeNB Downlink Interference by dynamically changing HeNB CSG ID  p. 19

7.2.2.4  Downlink interference management based on mapping between PCIs and transmission patterns  p. 20

7.2.2.5  Techniques for Dynamic Frequency Partitioning  p. 21

7.2.2.5.1  Support for dynamic FFR  p. 23

7.2.2.6  Victim UE Aware Downlink Interference Management  p. 23

7.2.2.6.1  Determination based on reported UE measurements  p. 24
7.2.2.6.2  Determination based on detected uplink transmissions  p. 24
7.2.2.6.3  Protection of idle mode UEs  p. 25

7.2.3  Power Control  p. 25

7.2.3.1  HeNB power control based on HUE measurement  p. 25

7.2.3.2  Smart power control based on interference measurement from macro BS  p. 26

7.2.3.3  HeNB power control based on HeNB-MUE path loss  p. 26

7.2.3.4  GPS Based HeNB Maximum Output Adjustment  p. 27

7.2.3.4.1  Maximum Output Power Adjustment based on GPS Detection Performance  p. 27
7.2.3.4.2  GPS Detection Performance Combined with Macro eNB Measurements  p. 28

7.3  Control of HeNB Uplink Interference  p. 28

7.3.1  Control Channel Protection  p. 28

7.3.1.1  HeNB Uplink Control Channel Protection  p. 28

7.3.1.2  Signaling offset over the backhaul  p. 29

7.3.2  Power Control  p. 29

7.3.2.1  Smart Power Control based on Path Loss to Worst Victim Macro eNodeB  p. 29

7.3.2.1.1  Power Cap Method  p. 30
7.3.2.1.2  Power Control based on PL from HUE to its serving HeNB and PL from HUE to its worst victim MeNB  p. 33
7.3.2.1.3  For Future Releases  p. 35

7.4  HeNB Self-configuration  p. 36

7.4.1  Information Exchange between eNBs and HeNBs  p. 36

7.5  Hybrid Cells  p. 38

7.5.1  Hybrid Access Level of Service  p. 38

7.5.2  DL Performance Evaluation  p. 39

7.5.3  Hybrid Cell RB Resource Management  p. 41

7.5.4  Hybrid Cell Power Management  p. 42

$  Change History  p. 43

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