Download 1.WCDMA RNO Power Control Algorithm Analysis and Parameter Configuration Guidance-200

Table of Contents
1 Overview ................................................................................................................................ 8
2 Analysis on Power Control Management Principle and Protocol ............................................ 8
2.1 Basic Principle of Power Control ........................................................................................ 8
2.1.1 Power Control Methods for Various Physical Channels .............................................. 8
2.1.2 Open Loop Power Control ............................................................................................ 9
2.1.3 Fast Power Control ....................................................................................................... 9
2.1.4 Outer Loop Power Control ......................................................................................... 10
2.1.5 Slow Power Control .................................................................................................... 13
2.2 Protocol Analysis of Power Control Process ................................................................... 13
2.2.1 Open Loop Power Control of PRACH ........................................................................ 13
2.2.1.1 PRACH Preamble Initial Value Setting .................................................................. 13
2.2.1.2 PRACH Power Control Sequence .......................................................................... 14
2.2.2 Open Loop Power Control of Uplink DPCCH............................................................. 14
2.2.3 Power Control of Uplink Dedicated Channel DPCCH and DPDCH .......................... 14
2.2.3.1 Basic process of uplink power control .................................................................... 14
2.2.3.2 Processing in case of out-of- sync .......................................................................... 15
2.2.3.3 Generation methods of downlink TPC command during RL initialization ......... 15
2.2.3.4 Algorithm 1 and Algorithm 2 for power control ...................................................... 16
2.2.3.5 Power increment calculation of uplink DPCCH channel ..................................... 17
2.2.3.6 Transmit Power of Control Channel and Data Channel ...................................... 18
2.2.3.7 Power Control in Compressed Mode ..................................................................... 20
2.2.4 Power Control of Downlink Private Channel DPCH ................................................... 24
2.2.4.1 Basic process of downlink power control ............................................................... 24
2.2.4.2 Calculation of the power of the current timeslot ................................................... 25
2.2.4.3 Downlink Power Balance ......................................................................................... 26
2.2.4.4 Power Control in Compressed Mode ..................................................................... 27
2.2.5 Power Configuration of Other Channels .................................................................... 29
2.2.5.1 Channels with power configured at the beginning of cell setup ......................... 29
2.2.5.2 Channels with power configured during common channel configuration ......... 30
2.2.6 Synchronization and Out-of-sync Processes ............................................................. 30
2.2.6.1 Initial synchronization and out-of-sync process of the downlink ........................ 30
2.2.6.2 Uplink initial synchronization and out-of-sync process ........................................ 32
2.2.6.3 Parameters involved in synchronization and out-of-sync .................................... 34
3 Power Management Parameters ........................................................................................... 35
3.1 UE Power Management Parameter ................................................................................. 38
3.1.1 Power Offset Pp-m ..................................................................................................... 38
3.1.2 Constant Value ........................................................................................................... 39
3.1.3 PRACH Power Ramp Step ........................................................................................ 39
3.1.4 Preamble Retrans Max ............................................................................................... 40
3.1.5 Preamble Threshold ................................................................................................... 40
3.1.6 DPCCH Power Offset (MP) ........................................................................................ 41
3.1.7 PC Preamble (MP) ..................................................................................................... 42
3.1.8 SRB Delay (MP) ......................................................................................................... 43
3.1.9 Gain Factors and , Reference TFC ID ......................................................... 43 c d
3.1.10 Power Control Algorithm (MP) .......................................................................... 46
3.1.11 TPC Step Size .................................................................................................. 47
3.1.12 DPC Mode (MP) ................................................................................................ 48
3.1.13 Maximum Allowed UL Tx Power (MP) .............................................................. 49
3.2 NodeB Power Management Parameter ........................................................................... 50
3.2.1 DL TPC Pattern 01 Count .......................................................................................... 50
3.2.2 PO1 (MP) .................................................................................................................... 50 WCDMA RNO Power Control Algorithm Analysis and Parameter Configuration Guidance Confidential 2004-07-09 Confidential Page 4 of 69
3.2.3 PO2 (MP) .................................................................................................................... 52
3.2.4 PO3 (MP) .................................................................................................................... 52
3.2.5 FDD TPC DL StepSize (OP) ...................................................................................... 53
3.2.6 Limited Power Increase .............................................................................................. 53
3.2.7 Power_Raise_Limit .................................................................................................... 54
3.2.8 DL Power Averaging Window Size ............................................................................ 55
3.2.9 DL Power Balance Switch .......................................................................................... 55
3.2.10 Inner Loop DL PC Status .................................................................................. 56
3.2.11 Initial DL transmission Powers.......................................................................... 56
3.2.12 Maximum Uplink SIR ........................................................................................ 57
3.2.13 Minimum Uplink SIR ......................................................................................... 58
3.2.14 UL SIR Targets ................................................................................................. 59
3.2.15 Maximum DL Tx Power .................................................................................... 60
3.2.16 Minimum DL Tx Power ..................................................................................... 63
3.2.17 Primary CPICH Power ...................................................................................... 63
3.3 Others ............................................................................................................................... 64
3.3.1 Outer Loop Power Control Adjustment Period (SirAdjustPeriod) .............................. 64
3.3.2 Outer Loop Power Control Adjustment Step (SirAdjustStep) .................................... 64
3.3.3 Outer Loop Power Control Adjustment Factor (SirAdjustFactor)............................... 65
3.3.4 Maximum SIR StepUp (MaxSirStepUp) ..................................................................... 65
3.3.5 Maximum SIR StepDown (MaxSirStepDown)............................................................ 65
3.3.6 BLERtarget ................................................................................................................. 66
3.3.7 In-Synchronization Threshold Qin .............................................................................. 66
3.3.8 Out-of-sync Threshold Qout ....................................................................................... 67
4 Appendix: Power Management Parameter Calculation ......................................................... 68