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2012-02-20, 03:20 PM
hi
PFA. add rep thanks if u like.
Table of Contents
1. Introduction ....................................................................... 13
2. Air interface dimensioning process ................................... 14
3. Dimensioning Concept Details - Link budget ..................... 16
3.1 General parameters .................................................................................... 16
3.1.1 E-UTRAN operating bands ......................................................................... 16
3.1.2 E-UTRAN channel bandwidth configurations .............................................. 18
3.1.3 NSN LTE radio units ................................................................................... 19
3.2 Tx/Rx Path Parameters .............................................................................. 21
3.2.1 eNodeB Tx power ....................................................................................... 21
3.2.2 UE Tx power ............................................................................................... 22
3.2.3 Power allocation ......................................................................................... 22
3.2.4 Antenna gain .............................................................................................. 23
3.2.5 Cable loss................................................................................................... 24
3.2.6 Other losses ............................................................................................... 27
3.2.7 Receiver noise figure .................................................................................. 28
3.3 Frame structure .......................................................................................... 28
3.3.1 Frame structure for FD-LTE ........................................................................ 28
3.3.2 Frame structure for TD-LTE ........................................................................ 31
3.3.3 Frame synchronization for TD-LTE ............................................................. 32
3.4 Overhead Factors ....................................................................................... 33
3.4.1 Cyclic Prefix (CP) ....................................................................................... 34
3.4.2 Control data overhead ................................................................................ 35
3.4.3 Estimated overhead .................................................................................... 44
3.4.4 TD-LTE system overhead ........................................................................... 46
3.5 Link Adaptation ........................................................................................... 48
3.5.1 MCS selection in the link budget ................................................................. 49
3.6 Channel model ........................................................................................... 57
3.7 Multi-antenna systems ................................................................................ 58
3.7.1 Beamforming .............................................................................................. 60
3.8 Frequency scheduling gain ......................................................................... 63
3.9 Link Budget Margins ................................................................................... 66
3.9.1 Fading margin ............................................................................................ 67
3.9.2 Interference margin .................................................................................... 71
3.9.3 Gain against shadowing ............................................................................. 77
3.10 Maximum allowable path loss ..................................................................... 77
3.10.1 Equivalent Isotropic Radiated Power .......................................................... 78
3.10.2 Receiver sensitivity ..................................................................................... 78
3.11 Clutter types and simulation cases ............................................................. 80
3.12 Propagation models .................................................................................... 80
3.12.1 One slope model ........................................................................................ 81
3.12.2 Two slope model ........................................................................................ 82
3.12.3 Cell range estimation .................................................................................. 83
3.12.4 UL and DL balancing .................................................................................. 83
3.13 Radio network configuration ....................................................................... 83
3.13.1 Cell area, site area and site-to-site distance ............................................... 84 4/136NWS LTE RA E2E SA NE Network Engineering LTE Dimensioning Guideline For internal use only Feb 2011
4. Data and VoIP dimensioning ............................................. 88
4.1 Data dimensioning ...................................................................................... 88
4.2 VoIP dimensioning ...................................................................................... 88
4.2.1 [LTE10] EPS bearer for Conversational Voice ............................................ 88
4.2.2 [LTE11] Robust Header Compression ........................................................ 90
4.2.3 [LTE571] Controlled UL packet segmentation ............................................. 91
4.2.4 [LTE907] TTI Bundling ................................................................................ 92
4.3 HARQ – Hybrid Automatic Repeat Request ................................................ 94
4.3.1 HARQ gain calculation................................................................................ 95
5. Control channel link budget ............................................... 96
5.1 PBCH (Physical Broadcast Channel) .......................................................... 96
5.2 PDCCH (Physical Downlink Control Channel) ............................................ 96
5.2.1 [LTE616] Usage based PDCCH adaptation ................................................ 98
5.3 PCFICH (Physical Control Format Indicator Channel) ................................ 99
5.4 PHICH (Physical Hybrid ARQ Indicator Channel) ....................................... 99
5.5 [LTE430] DL power boosting for control channels ..................................... 100
5.5.1 RS power boosting ................................................................................... 100
5.5.2 PCFICH power boosting ........................................................................... 101
5.5.3 PHICH power boosting ............................................................................. 102
5.5.4 Impact of RS/PCFICH/PHICH boosting on PDCCH/PDSCH .................... 102
5.6 PRACH(Physical Random Access Channel) ............................................ 102
5.7 Random Access Msg3 .............................................................................. 103
5.8 PUCCH (Physical Uplink Control Channel) ............................................... 104
6. Site capacity ................................................................... 106
6.1 Cell load impact ........................................................................................ 107
6.2 UE speed impact ...................................................................................... 109
6.3 6-sector impact ......................................................................................... 109
6.4 MIMO and beamforming impact ................................................................ 110
6.4.1 [LTE70] DL adaptive open loop MIMO for two antennas ........................... 110
6.4.2 [LTE703] DL adaptive closed loop MIMO for two antennas ...................... 111
6.4.3 [LTE493] TDD beamforming (8-pipe) ........................................................ 112
6.4.4 [LTE945] Beamforming and AAS solution for Softbank (4/8-pipe) ............. 112
6.4.5 [LTE541] Dual stream beamforming (4Tx/8Tx) ......................................... 113
6.4.6 [LTE936] Interference Rejection Combining (IRC) .................................... 115
6.5 Other capacity features............................................................................. 116
6.5.1 [LTE46] Channel aware uplink scheduler ................................................. 116
6.5.2 [LTE619] Interference aware scheduler .................................................... 117
6.5.3 [LTE829] Increased uplink MCS range ..................................................... 118
6.5.4 [LTE566] Load dependent UL power control ............................................. 118
6.6 Cell capacity estimation procedure ........................................................... 119
7. Traffic Model ................................................................... 122
8. Site count computation ................................................... 123 5/136NWS LTE RA E2E SA NE Network Engineering LTE Dimensioning Guideline For internal use only Feb 2011
9. Baseband dimensioning .................................................. 124
9.1 Flexi Multiradio BTS ................................................................................. 125
9.2 Number of supported cells ........................................................................ 126
9.3 Peak L1 throughput .................................................................................. 128
9.4 Supported cell range ................................................................................ 129
9.5 Number of supported users ...................................................................... 130
9.5.1 Number of active users ............................................................................. 130
9.6 Exemplary baseband dimensioning .......................................................... 133
9.6.1 Assumptions: ............................................................................................ 133
9.6.2 Active users calculation (recommended) .................................................. 134
9.6.3 Active users calculation (aggressive) ........................................................ 134
9.6.4 Example summary .................................................................................... 135
Annex A – RNT_LTE_Dim Quick User Guide ............................... 136
Annex B – Multiradio BTS ............................................................. 136
Annex C – Impact of Different Operating Bands ........................... 136
Annex D – Indoor Dimensioning ................................................... 136
PFA. add rep thanks if u like.
Table of Contents
1. Introduction ....................................................................... 13
2. Air interface dimensioning process ................................... 14
3. Dimensioning Concept Details - Link budget ..................... 16
3.1 General parameters .................................................................................... 16
3.1.1 E-UTRAN operating bands ......................................................................... 16
3.1.2 E-UTRAN channel bandwidth configurations .............................................. 18
3.1.3 NSN LTE radio units ................................................................................... 19
3.2 Tx/Rx Path Parameters .............................................................................. 21
3.2.1 eNodeB Tx power ....................................................................................... 21
3.2.2 UE Tx power ............................................................................................... 22
3.2.3 Power allocation ......................................................................................... 22
3.2.4 Antenna gain .............................................................................................. 23
3.2.5 Cable loss................................................................................................... 24
3.2.6 Other losses ............................................................................................... 27
3.2.7 Receiver noise figure .................................................................................. 28
3.3 Frame structure .......................................................................................... 28
3.3.1 Frame structure for FD-LTE ........................................................................ 28
3.3.2 Frame structure for TD-LTE ........................................................................ 31
3.3.3 Frame synchronization for TD-LTE ............................................................. 32
3.4 Overhead Factors ....................................................................................... 33
3.4.1 Cyclic Prefix (CP) ....................................................................................... 34
3.4.2 Control data overhead ................................................................................ 35
3.4.3 Estimated overhead .................................................................................... 44
3.4.4 TD-LTE system overhead ........................................................................... 46
3.5 Link Adaptation ........................................................................................... 48
3.5.1 MCS selection in the link budget ................................................................. 49
3.6 Channel model ........................................................................................... 57
3.7 Multi-antenna systems ................................................................................ 58
3.7.1 Beamforming .............................................................................................. 60
3.8 Frequency scheduling gain ......................................................................... 63
3.9 Link Budget Margins ................................................................................... 66
3.9.1 Fading margin ............................................................................................ 67
3.9.2 Interference margin .................................................................................... 71
3.9.3 Gain against shadowing ............................................................................. 77
3.10 Maximum allowable path loss ..................................................................... 77
3.10.1 Equivalent Isotropic Radiated Power .......................................................... 78
3.10.2 Receiver sensitivity ..................................................................................... 78
3.11 Clutter types and simulation cases ............................................................. 80
3.12 Propagation models .................................................................................... 80
3.12.1 One slope model ........................................................................................ 81
3.12.2 Two slope model ........................................................................................ 82
3.12.3 Cell range estimation .................................................................................. 83
3.12.4 UL and DL balancing .................................................................................. 83
3.13 Radio network configuration ....................................................................... 83
3.13.1 Cell area, site area and site-to-site distance ............................................... 84 4/136NWS LTE RA E2E SA NE Network Engineering LTE Dimensioning Guideline For internal use only Feb 2011
4. Data and VoIP dimensioning ............................................. 88
4.1 Data dimensioning ...................................................................................... 88
4.2 VoIP dimensioning ...................................................................................... 88
4.2.1 [LTE10] EPS bearer for Conversational Voice ............................................ 88
4.2.2 [LTE11] Robust Header Compression ........................................................ 90
4.2.3 [LTE571] Controlled UL packet segmentation ............................................. 91
4.2.4 [LTE907] TTI Bundling ................................................................................ 92
4.3 HARQ – Hybrid Automatic Repeat Request ................................................ 94
4.3.1 HARQ gain calculation................................................................................ 95
5. Control channel link budget ............................................... 96
5.1 PBCH (Physical Broadcast Channel) .......................................................... 96
5.2 PDCCH (Physical Downlink Control Channel) ............................................ 96
5.2.1 [LTE616] Usage based PDCCH adaptation ................................................ 98
5.3 PCFICH (Physical Control Format Indicator Channel) ................................ 99
5.4 PHICH (Physical Hybrid ARQ Indicator Channel) ....................................... 99
5.5 [LTE430] DL power boosting for control channels ..................................... 100
5.5.1 RS power boosting ................................................................................... 100
5.5.2 PCFICH power boosting ........................................................................... 101
5.5.3 PHICH power boosting ............................................................................. 102
5.5.4 Impact of RS/PCFICH/PHICH boosting on PDCCH/PDSCH .................... 102
5.6 PRACH(Physical Random Access Channel) ............................................ 102
5.7 Random Access Msg3 .............................................................................. 103
5.8 PUCCH (Physical Uplink Control Channel) ............................................... 104
6. Site capacity ................................................................... 106
6.1 Cell load impact ........................................................................................ 107
6.2 UE speed impact ...................................................................................... 109
6.3 6-sector impact ......................................................................................... 109
6.4 MIMO and beamforming impact ................................................................ 110
6.4.1 [LTE70] DL adaptive open loop MIMO for two antennas ........................... 110
6.4.2 [LTE703] DL adaptive closed loop MIMO for two antennas ...................... 111
6.4.3 [LTE493] TDD beamforming (8-pipe) ........................................................ 112
6.4.4 [LTE945] Beamforming and AAS solution for Softbank (4/8-pipe) ............. 112
6.4.5 [LTE541] Dual stream beamforming (4Tx/8Tx) ......................................... 113
6.4.6 [LTE936] Interference Rejection Combining (IRC) .................................... 115
6.5 Other capacity features............................................................................. 116
6.5.1 [LTE46] Channel aware uplink scheduler ................................................. 116
6.5.2 [LTE619] Interference aware scheduler .................................................... 117
6.5.3 [LTE829] Increased uplink MCS range ..................................................... 118
6.5.4 [LTE566] Load dependent UL power control ............................................. 118
6.6 Cell capacity estimation procedure ........................................................... 119
7. Traffic Model ................................................................... 122
8. Site count computation ................................................... 123 5/136NWS LTE RA E2E SA NE Network Engineering LTE Dimensioning Guideline For internal use only Feb 2011
9. Baseband dimensioning .................................................. 124
9.1 Flexi Multiradio BTS ................................................................................. 125
9.2 Number of supported cells ........................................................................ 126
9.3 Peak L1 throughput .................................................................................. 128
9.4 Supported cell range ................................................................................ 129
9.5 Number of supported users ...................................................................... 130
9.5.1 Number of active users ............................................................................. 130
9.6 Exemplary baseband dimensioning .......................................................... 133
9.6.1 Assumptions: ............................................................................................ 133
9.6.2 Active users calculation (recommended) .................................................. 134
9.6.3 Active users calculation (aggressive) ........................................................ 134
9.6.4 Example summary .................................................................................... 135
Annex A – RNT_LTE_Dim Quick User Guide ............................... 136
Annex B – Multiradio BTS ............................................................. 136
Annex C – Impact of Different Operating Bands ........................... 136
Annex D – Indoor Dimensioning ................................................... 136