(E)GPRS Radio Networks - Planning Theory 2.0.pdf (2.14 MB)【資料名稱】：(E)GPRS Radio Networks - Planning Theory 2.0.pdf

【資料作者】：Ville Salomaa

【資料日期】：18.12.2006

【資料語言】：英文

【資料格式】：PDF

【資料目錄和簡介】：

1. Introduction .................................................................................................................................... 6
1.1 (E)GPRS Dimensioning, Planning and Optimization Structure ............................................... 7
1.2 PCU1 and PCU2 Differences .................................................................................................. 7
1.2.1 PCU2 Plug-in Unit Variants and Hardware Architecture .................................................. 8
1.2.2 PCU2 Software Architecture ............................................................................................ 8
1.2.3 PCU1 and PCU2 Software Differences on Air Interface ................................................ 10
1.3 DTM with S12 ........................................................................................................................ 10
2. (E)GPRS Modulation.................................................................................................................... 11
2.1 GMSK and 8-PSK Modulation ............................................................................................... 11
2.2 Modulation Block Diagrams................................................................................................... 12
2.3 Back-off in EGPRS................................................................................................................ 13
2.4 Burst Structure....................................................................................................................... 15
3. Coding Schemes.......................................................................................................................... 18
3.1 Protocol Architecture ............................................................................................................. 18
3.1.1 Physical Layer ................................................................................................................ 19
3.1.2 RLC/MAC Layer ............................................................................................................. 19
3.1.3 Logical Link Control........................................................................................................ 25
3.1.4 SNDCP Layer................................................................................................................. 25
3.1.5 IP, TCP/UDP and Application Layer............................................................................... 26
3.2 RLC/MAC Coding Schemes .................................................................................................. 28
3.2.1 GPRS Coding Schemes (CSs)....................................................................................... 28
3.2.2 EGPRS Modulation and Coding Schemes (MCSs)........................................................ 32
4. (E)GPRS Procedures................................................................................................................... 34
4.1 TBF Establishment ................................................................................................................ 34
4.1.1 Channel Request and Packet Immediate Assignment ................................................... 34
4.1.2 DL TBF Assignment ....................................................................................................... 35
4.1.3 UL TBF Assignment ....................................................................................................... 37
4.1.3.1 Channel Request - Packet Access Procedure (CCCH / PCCH)................................. 37
4.1.3.2 EGPRS Packet Channel Request .............................................................................. 39
4.1.3.3 Dynamic and Extended Dynamic Allocation on UL with and without USF4................ 40
4.1.3.4 UL TBF ASSIGNMENT, MS on CCCH, 2 phase access ............................................ 40
4.1.3.5 UL TBF ASSIGNMENT, MS on CCCH, 1 phase access ............................................ 41
4.1.3.6 EGPRS UL TBF ASSIGNMENT, MS on PCCCH with 2 phase access...................... 43
4.1.3.7 EGPRS UL TBF ASSIGNMENT, MS on PCCCH with 1 phase access...................... 43
4.1.3.8 Establishment of EGPRS UL TBF when DL TBF is ongoing ...................................... 44
4.2 (E)GPRS Data Transfer......................................................................................................... 45
4.2.1 (E)GPRS Data Transfer DL............................................................................................ 45
4.2.2 (E)GPRS Data Transfer UL............................................................................................ 46
4.3 Mobility with Cell-reselection ................................................................................................. 47
4.3.1 Intra PCU Cell-Reselection ............................................................................................ 47
4.3.2 Inter PCU Cell-reselection (Intra BSC)........................................................................... 48
4.3.3 RA/LA Update (intra PAPU) ........................................................................................... 49
4.3.4 RA/LA Update (Inter PAPU or inter SGSN).................................................................... 50
4.4 TBF Release.......................................................................................................................... 52
4.4.1 Packet TBF Release Content......................................................................................... 52
4.4.2 Abnormal Releases ........................................................................................................ 52
4.4.3 TBF Release in PCU2 .................................................................................................... 53
5. (E)GPRS Accessibility.................................................................................................................. 54
5.1 Air Interface Signaling Load .................................................................................................. 55
5.1.1 Common Control Channels ............................................................................................ 56
5.1.1.1 Paging Channel .......................................................................................................... 56
5.1.1.2 Access Grand Channel............................................................................................... 57
5.1.1.3 Random Access Channel ........................................................................................... 57
INTERNAL 3 (181)
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(E)GPRS RADIO NETWORKS - Planning Theory Version 2.0
5.1.2 SDCCH........................................................................................................................... 57
5.1.3 PBCCH Implementation ................................................................................................. 58
5.1.3.1 Channel Configuration ................................................................................................ 59
5.1.3.2 Downlink Direction ...................................................................................................... 60
5.1.3.3 Uplink Direction........................................................................................................... 60
5.1.3.4 Amount of PCCCH...................................................................................................... 61
5.1.3.5 PBCCH Configuration................................................................................................. 61
5.2 TRXSIG Load ........................................................................................................................ 65
5.2.1 TRXSIG Load Theory..................................................................................................... 65
5.2.1.1 Abis Protocols............................................................................................................. 65
5.2.1.2 TRXSIG Load Components, Measurement and Analysis........................................... 67
5.3 BCSU Load............................................................................................................................ 70
5.3.1 BSC RAW Measurement Results................................................................................... 70
5.3.2 Network Doctor 184 Report............................................................................................ 71
5.4 Signaling Load with DTM Usage ........................................................................................... 71
6. Resource Allocation in BSS ......................................................................................................... 72
6.1 Cell Reselection..................................................................................................................... 73
6.1.1 C1 and C2 ...................................................................................................................... 73
6.1.2 C31/C32 ......................................................................................................................... 74
6.1.3 Network Controlled Cell Reselection.............................................................................. 77
6.1.3.1 NCCR Benefits ........................................................................................................... 77
6.1.3.2 NCCR Functionality .................................................................................................... 78
6.1.3.3 Target cell selection.................................................................................................... 79
6.1.3.4 Signaling Flow ............................................................................................................ 80
6.1.3.5 BLER Limits are Needed for the Quality Control Function in PCU2 ........................... 81
6.2 BTS Selection........................................................................................................................ 82
6.2.1 Initial BTS Selection ....................................................................................................... 82
6.2.2 BTS Selection for Reallocating TBF............................................................................... 85
6.2.2.1 BTS Load Reallocation ............................................................................................... 86
6.2.2.2 Uplink Rx Lev Reallocation......................................................................................... 87
6.2.2.3 Downlink Rx Lev Reallocation .................................................................................... 88
6.2.2.4 Downlink RX Lev Received First Time Reallocation................................................... 88
6.2.2.5 BTS Selection in PCU2............................................................................................... 89
6.2.2.6 Territory Upgrade Request in PCU2........................................................................... 89
6.3 Channel Scheduling .............................................................................................................. 90
6.3.1 Priority based Quality of Service .................................................................................... 90
6.3.2 Channel Allocation ......................................................................................................... 91
6.3.3 TBF Scheduling.............................................................................................................. 92
6.3.4 QoS Information Delivery ............................................................................................... 93
6.3.5 Enhanced Quality of Service .......................................................................................... 94
6.3.6 Nokia HLR QoS Settings................................................................................................ 95
6.4 Flow Control on Gb................................................................................................................ 99
7. (E)GPRS Timeslot Data Rate .................................................................................................... 100
7.1 GSM Network Performance................................................................................................. 101
7.1.1 Impact of Coverage Level ............................................................................................ 101
7.1.1.1 Signal Strength Requirements.................................................................................. 102
7.1.1.2 Receiving End........................................................................................................... 102
7.1.1.3 Measurement Results............................................................................................... 104
7.1.2 Impact of Interference Level......................................................................................... 105
7.1.2.1 Simulation Results .................................................................................................... 105
7.1.2.2 Spectrum Efficiency and Frequency Reuse.............................................................. 110
7.1.2.3 Measurement Results............................................................................................... 111
7.1.3 Mixture of Signal Level and Interference...................................................................... 112